promissory
/ˈprɒmɪsərɪ/adjective
1- chiefly Law conveying or implying a promise【主律】约定的; 承诺的：
statements that are promissory in nature
具有约定性质的陈述
promissory words.
承诺。
1.1
- archaic indicative of something to come; full of promise〈古〉预示的; 有希望的：
the glow of evening is promissory of the splendid days to come.
晚霞预示未来几天将是阳光灿烂。
词源
late Middle English: from medieval Latin promissorius,from promiss- 'promised'，from the verb promittere （see PROMISE）.