出典:Wiktionary
well-used (comparative better-used または more well-used, superlative best-used または most well-used)
Also used both predicatively and attributively as well used; but the hyphenated form should only be used attributively.
よく発酵した
well-leavened
よく使われている.
まめに使用する
常用する
to understand and make use of something
恐れ多いさま
to be useful―of use―serviceable―of service―good for something