I am learning humility.

The word “delve” is labelled by the OED as northern and Scottish – and right up against Wales, one source says it is specifically to dig two spades deep.  Clearly that’s a regional, parochial word, one which I should by my own arbitrary rule tag as “low”.  It’s also in the middle of a rather high-register poem in a position rhyming with “elves”, which by any first approximation should make it be tagged “high”.  I have tagged it both.

• 01.078 And harps of gold; where no man delves

“delve, v.” OED Online. Oxford University Press, March 2015. Web. 20 May 2015.