source: THAT PINKY PROMISE | Anime Amino

a declaration or assurance that one will do a particular thing or that a particular thing will happen:

«…するという/…という/…を与えるという» 約束 «to do/that節/of» ; 【人から/人に対する】約束 «from/to»

e.g. what happened to all those firm promises of support?

e.g. with clause : he took my fax number with the promise that he would send me a drawing

e.g. with infinitive : I did not keep my promise to go home early.

the quality of potential excellence:

(前途の)見込み, 有望; 気配, 兆し

e.g. he showed great promise even as a junior officer.

in singular an indication that something specified is expected or likely to occur:

e.g. the promise of peace.

1. reporting verb assure someone that one will definitely do, give, or arrange something; undertake or declare that something will happen:

〈物･事〉を約束する;〖promise to do〗 …すると約束する［請け合う］

e.g. with infinitive : he promised to forward my mail

〖promise (A) (that)節〗 (A〈人〉に)…ということを約束する

e.g. with clause : she made him promise that he wouldn't do it again

｟書｠ 〖直接話法〗…と約束して言う (!(1)コーパス伝達部は文尾のほか, 文中･文頭も可能(2)直接引用部は通例一人称主語)

e.g. with direct speech : “I'll bring it right back,” she promised

〖promise (A) B/B(to A)〗 (A〈人〉に)B〈物･事〉を与えると約束する

e.g. with two objects : he promised her the job.

with object (usually be promised) archaic pledge (someone, especially a woman) to marry someone else; betroth:

e.g. I've been promised to him for years.

2. with object give good grounds for expecting (a particular occurrence or situation):

〈事が〉〈事〉が起こりそうなことを示す

e.g. forthcoming concerts promise a feast of music from around the world

〖～ to do〗 〈事が〉…しそうである

e.g. with infinitive : it promised to be a night that all present would long remember.

(of a person, publication, institution, etc.) announce (something) as being expected to happen:

e.g. with two objects : we're promised more winter weather tonight

e.g. in its pre-Christmas trading statement it promised record results.

(promise oneself) contemplate the pleasant expectation of:

〖～ oneself (that)節〗 …ということを心に決める, 心待ちにする

e.g. he tidied up the room, promising himself an early night.

informal used for emphasis, especially so as to reassure, encourage, or threaten someone:

e.g. oh, I'm not joking, I promise you.

make extravagant promises to someone that are unlikely to be fulfilled:

e.g. interactive technology titillates, promises the earth but delivers nothing.

informal used to indicate that the speaker is skeptical about someone's stated intention to do something.

promiser noun

late Middle English: from Latin promissum ‘something promised’, neuter past participle of promittere ‘put forth, promise’, from pro- ‘forward’ + mittere ‘send’.