よーく

very well, carefully, thoroughly

→ 良く
よー good + く Adverbial form
adverb Rare #39,555
very well, carefully, thoroughly The elongated vowel adds emphasis; the standard spelling is よく.
JA: よーく聞いてください。
EN: Please listen very carefully.
Forms of 良く
よく良くよーく

昔は皆それをよーく知っておった

Back then, everyone knew that very well.

— 天気の子 (2019)

よーく聞いてください。

Please listen carefully.

あなたがこの町に来た日のことをよーく覚えてますよ

I remember the day you came to this town like it was yesterday.

— 魔女の宅急便 (1989)

よーく息子さんと相談してねっ

Make sure you talk it over carefully with your son, okay?

— 万引き家族 (2018)