适用 shìyòng to be applicable
怎么记住“适用”: 适 suitable + 用 to use (Kangxi radical 101) = to be applicable.
汉字
用法
- To be applicable to a case - 这条规定适用于所有人 (zhè tiáo guīdìng shìyòng yú suǒyǒu rén) this rule applies to everyone. Note the pattern 适用于 (applies to).
- About scope of applicability, not physical usability; 'usable/practical' is 实用 (shíyòng) or 好用 (hǎoyòng).