- 22 Feb 2008
- 18,266
- 4,926
Actually, 咲 originally means "to smile" in Chinese. It means "to bloom" only in Japanese because of an idiom 鳥鳴き花笑ふ, so "mouth" has noting to do with "bloom" etymologically.I'd think of the action of blooming as similar to opening the mouth, so it's connected in that way.
咲の意味と読み方|漢字辞典
(all in Japanese)
That might be useful to remember the kanji 唄 just like Memrise, KanjiDamage or WaniKani, as lanthas-san mentioned, but again 貝 only provides the pronunciation of 唄 etymologically.I don't recall seeing that kanji before, but again, you can remember it by thinking of a shell opening its "mouth" as mimicking the action of singing.
Radicals indeed often can give a part of the meaning of kanji, but the OP asked why the combination of the components can't express the meaning of the kanji. I don't think 'the action of blooming as similar to opening the mouth' or 'a shell opening its "mouth" as mimicking the action of singing' can be useful for their question. It's not even correct in the first place.