I am moving through paragraph 08.016, and here’s a common word used 185 times in the work. It has meanings to do with distillery (not used in The Hobbit); to do with lack of commotion (as in still water or the still, small voice) and with this meaning can be adjective, adverb, or noun; and from lack of commotion we get to the exclusively adverbial meaning.

So, OED, bless it, tells me that this meaning is obsolete and poetic:

With reference to action or condition: Without change, interruption, or cessation; continually, constantly; on every occasion, invariably; always. Obsolete exc. poetic.

But tells me that meaning 4 is different from that obsolete one:

4. Indicating the continuance of a previous action or condition.

Very well. I bow to the magisters of hair-splitting.

• 01.004 but certainly there was still something
• 01.005 Still it is probable that Bilbo,
• 01.006 and the hobbits were still numerous
• 01.017 but I had no idea you were still
• 01.023 was still standing outside the door,
• 01.068 Bilbo stood still
• 01.071 and still they played on,
• 01.072 and still they played on.
• 01.119 but so far still Tookishly determined to go on with things.
• 01.124 we still mean to get it back,
• 01.143 he could hear Thorin still humming to himself
• 02.027 but still he began to feel that adventures were not so bad after all.
• 02.030 Still the dwarves jogged on,
• 02.116 also one barrel of ale which was still full.
• 03.032 there were still some people
• 03.037 I have heard that there are still forgotten treasures of old
• 03.047 We still call it Durin’s Day
• 04.002 they were still going up
• 04.004 More terrible still are thunder
• 04.012 and the thunder still growling,
• 04.012 Still it was not very far to go,
• 04.044 Still goblins go faster than dwarves,
• 04.048 The ones behind yelled still more,
• 05.004 Still at the moment he felt very crushed.
• 05.008 still they are more used to tunnelling than we are,
• 05.009 All he knew was that it was still going down pretty steadily
• 05.009 and still he heard no sound of anything
• 05.011 Still he did not dare to wade out into the darkness.
• 05.011 and the original owners are still there
• 05.030 Then they stand still.
• 05.034 who was still thinking uncomfortably about eating.
• 05.041 and still he did not answer;
• 05.060 still he could not think of anything.
• 05.073 but still he did not dare to waste his last guess.
• 05.078 He sat still,
• 05.087 when such rings were still at large
• 05.087 And still sometimes he put it on,
• 05.087 He still had a bone or two left to gnaw,
• 05.089 Still he waited a while;
• 05.110 who was still going quickly,
• 05.119 still cautiously,
• 05.119 Still there it was:
• 05.130 but still he held on.
• 05.138 And there was the ring still,
• 05.146 It was still ajar,
• 05.148 while bewildered goblins were still picking up
• 06.002 they are not still back there
• 06.003 He still wandered on,
• 06.005 He crept still nearer,
• 06.005 He had still got the ring on,
• 06.014 If they had still doubted that he was really a first-class burglar,
• 06.031 where they still come
• 06.034 And we are still pretty high up.
• 06.039 but the blackberries were still only
• 06.040 They still went on
• 06.045 they could still see the evening lights on the plains beyond.
• 06.058 Still Dori did not let Bilbo down.
• 06.061 for whom they were probably still hunting.
• 06.084 A few eagles were still circling
• 07.002 The sun was still close to the eastern edge of things.
• 07.012 You are still some miles north of the path
• 07.014 if still sore
• 07.018 Still I warn you he gets angry easily.’
• 07.024 They still had a long way to walk before them.
• 07.045 and was still warm
• 07.076 Or have you still got some more jacks
• 07.096 and still they sat
• 07.120 and while the dwarves were still singing songs he dropped asleep,
• 07.120 still puzzling his little head about Beorn,
• 07.121 So here you all are still!’
• 07.122 the goblin patrols were still hunting
• 07.123 but I like it still better now I am sure it is true.
• 07.130 if they had still had their ponies,
• 07.130 and would have left them still with a long
• 07.131 Still you are safer going north,
• 07.133 Still the next morning dawned bright
• 07.133 and while the shadows were still long they were off again.
• 07.133 that they rode still forward after dusk
• 07.143 he still said the same.
• 08.002 and still more luck
• 08.004 and it was everlastingly still
• 08.006 Worse still it brought thousands of dark-grey
• 08.007 and still the forest seemed just the same,
• 08.012 Still twelve yards is as good as a mile.
• 08.016 and still has the best sight,’
• 08.022 looking at the snapped painter that was still dangling from it.
• 08.029 (still grumbling)
• 08.029 and then go still.
• 08.031 They could still see his hood
• 08.032 They were still standing over him,
• 08.035 and the gloom gathered still deeper on them
• 08.038 Still Bombur slept
• 08.044 Still he did not see this,
• 08.046 that they were still gnawingly hungry,
• 08.089 in Bombur still.
• 08.092 and even grown-up he had still spent a deal of his time at quoits, dart-throwing,
• 08.100 “but still they cannot find me!”
• 08.108 But there were still five dwarves hanging at the end of the branch
• 08.125 though he would have felt a lot bolder still,
• 08.131 Still elves they were
• 09.016 and the still unconquered dragon)
• 09.019 It seemed a town of Men still throve there,
• 09.035 still happily snoring with smiles upon their faces.
• 09.044 and still less at being laughed at.
• 09.055 he could hear the elves still singing
• 09.069 but whether alive or dead still remains to be seen.
• 10.002 but still a strong water flowed on steadily through the midst.
• 10.003 still,
• 10.006 In the still evening air
• 10.007 who still dared to dwell here
• 10.007 They still throve on the trade
• 10.007 The rotting piles of a greater town could still be seen
• 10.008 though some still sang old songs
• 10.011 Are you still
• 10.016 Still –
• 10.040 Still, I daresay, more was guessed than was known,
• 10.042 While the enthusiasm still lasted
• 11.010 The dragon is still alive
• 11.011 and still I expect smokes
• 11.014 and brought them at last to a still narrower ledge,
• 11.014 grassy-floored, still and quiet.
• 11.032 but still Bilbo stood almost without moving.
• 11.036 Try it now while there is still time!’
• 12.008 and stopped where he could still see
• 12.010 but went still on
• 12.017 but still he clutched the cup,
• 12.019 The dwarves were still passing the cup
• 12.020 Smaug was still to be reckoned with.
• 12.027 and still all was safe.
• 12.027 and still all was safe.
• 12.033 to last them still for some time.
• 12.095 and we know that still;
• 12.095 and I still think that when we have won it will be time enough
• 12.096 if they were still lying there
• 12.101 What would have happened if the door had still been open
• 12.101 glad to be still alive,
• 13.001 they woke still to darkness
• 13.017 Mr. Baggins was still officially their expert burglar
• 13.018 while he was still near enough,
• 13.018 and still went on.
• 13.023 And still there was no sight nor sound of Smaug.
• 13.029 and still there were no dragon-noises,
• 13.034 and finding still hanging there many golden harps
• 13.034 they were still
• 13.038 Still I wish there was a looking-glass handy!’
• 13.048 still showing the fragments of old carven work within,
• 13.055 even if the old steps are still there.’
• 13.067 Still,
• 14.011 Still they had a little time.
• 14.015 and still no arrow hindered Smaug or hurt him
• 14.018 But there was still a company of archers
• 14.026 while some were still willing to defend it.
• 14.036 I serve you still –
• 14.042 Still elves are lightfooted,
• 14.044 who were still able,
• 15.001 and the crows that still lived about the Mountain
• 15.014 but we remember still the king that was of old.
• 15.021 If you would earn our thanks still more,
• 15.021 if any of you are still young
• 15.026 you will see that the dwarves still had some days before them.
• 15.026 and at such work the dwarves were still very skilled.
• 15.027 and they still had a breathing space.
• 15.027 Better still,
• 15.031 The morning was still pale
• 15.052 And still my other claims remain unanswered.’
• 15.060 The whole place still stinks of dragon,’
• 16.026 (which he still wore over his mail)
• 16.046 it was still where he had left it.
• 17.004 Are you still of the same mind?’
• 17.005 Still the elf-host has not departed as I bade!
• 17.031 The morning was still early
• 17.037 Let us hope still for something
• 17.040 Still more suddenly a darkness came on
• 17.054 while still the great bats swirled
• 18.002 but I suppose there is still time enough for that!’
• 18.003 Surely there was a camp still
• 18.003 But all was deadly still.
• 18.022 they were still outnumbered.
• 18.023 The dwarves were making a stand still
• 18.025 but the pursuit was still on foot,
• 18.051 The Wild was still the Wild,
• 19.001 Bilbo heard the elves still singing
• 19.002 Here grass is still growing,
• 19.025 still hidden
• 19.036 they were more surprised still.

“still, adv.” OED Online, Oxford University Press, June 2019, http://www.oed.com/view/Entry/190289. Accessed 31 July 2019.