Adverbial form of 良い, used to describe doing something in a good, proper, or skilled manner. Often appears as よく, but よう is a colloquial or dialectal variant.
See also: よく
This machine works well.
Used to indicate that something happens often. More commonly expressed as よく, but よう appears in some dialects or casual speech.
See also: よく
how (could you); why (would you)
Expresses incredulity, sarcasm, or disapproval. Often used in rhetorical questions. Equivalent to よく in similar expressions.
How can you say such a thing?
He did it skillfully.
I often go to that shop.
How can you tell such a lie?
Casual elongated spelling, often in informal writing.
Kanji spelling using 良; rare and literary.
Kanji spelling using 善; very rare.
Kanji spelling using 能; very rare.
Colloquial or dialectal variant of the adverbial form よく, from 良い (good). The exact regional or historical derivation is uncertain.