It is the superlative of the adjective/adverb “bottom”
- 12.012 Before him lies the great bottommost cellar
“bottom, n.” OED Online. Oxford University Press, June 2015. Web. 28 July 2015.
It is the superlative of the adjective/adverb “bottom”
“bottom, n.” OED Online. Oxford University Press, June 2015. Web. 28 July 2015.