entries → 到底
TSUMUGU · TOCFL 4 (est.) · 詞
到底 word · TOCFL 4 (est.)
到底 ＝ 到 ＋ 底
ㄉㄠˋ ㄉㄧˇ · dàodǐ
adverb — after all, in the end; to the very bottom

字源 FORM — what the parts do

到to reach (到達)dào
底the bottom (底下)dǐ广 a shelter; 氐 dǐ gives the sound
到底，到達的到，底下的底。
關 · Related
底下dǐxiàunderneath, the same 底