说到底
shuōdàodǐ · HSK 7
Conclude
💬⬇️ 说到底 = speak (说) + reach (到) + bottom (底): talk it down to the bottom, i.e. in the final analysis
Literally speaking something all the way to its 底 (bottom). When you talk a matter down to its lowest layer, you reach the conclusion — what it all comes down to after everything.
说 — speech radical 讠(言) + 兑
说 combines the speech radical 讠(言, 'words') with 兑, which acts as the phonetic component. The character originally meant 'to explain' or 'to speak,' and broadened to mean 'say' or 'talk.' The same graph is also read 'yuè' meaning 'pleased,' a sense later written 悦.
到 — 刂 knife + 至 (phonetic, 'arrive')
到 is a semantic-phonetic compound. 至 ('to arrive') gives both meaning and sound, while 刂 (knife) was added later, likely as a phonetic reinforcer or to distinguish the written form. The core sense 'to arrive, reach' comes directly from 至, and 到 has carried that meaning since early script forms.
底 — 广 (shelter radical) + 氐 (phonetic 'dǐ')
底 is a semantic-phonetic compound. The 广 radical depicts a roofed structure or shelter, suggesting the bottom or base of a building. The component 氐 supplies the sound 'dǐ' and originally meant 'low' or 'base,' reinforcing the meaning. Together they convey 'bottom,' 'foundation,' or 'underneath.'