10 letters · 14 points in Scrabble
adverb on the lower or downward side; on the underside of
adverb under or below an object or a surface; at a lower place or level; directly beneath
originFrom Middle English undernethe, undernethen, from Old English underneoþan (“underneath”), ultimately from Proto-Germanic *underniþer. Equivalent to under- + neath.
Etymology from Wiktionary, CC BY-SA 3.0