inappropriately
🇺🇸
/ˌɪnəˈprəʊpriətli/
🇬🇧
/ˌɪnəˈprəʊpriətli/
in a way that is not right for the time or place
He laughed inappropriately during the serious meeting.
彼は真剣な会議中に不適切に笑った。