dec·o·rous
adjective/ˈdekərəs/
/ˈdekərəs/
(formal)- polite and appropriate in a particular social situation
礼貌得体的；端庄稳重的 - a decorous kiss
礼貌得体的一吻
Word Originmid 17th cent. (in the sense ‘appropriate, seemly’): from Latin decorus ‘seemly’ + -ous. - a decorous kiss