英和和英

I'll give my word.

to promise something

make a promise

give [pledge] one's word

I promise.

make an appointment

an empty promise

a pledge or agreement to do something

to keep one's promise―keep one's word―fulfil a promise―make good one's promise

It's a promise!

to fulfil a promise

secret promise

to make a solemn promise

to exchange definite promises

to make a solemn promise with someone

（席の札なら）Reserved―（物品の札なら）―Sold

You have to promise me.

to secretly promise

to promise formally or by an oath

a promise

to release one from a promise

depart from one's promise

to miss an appointment

promise faithfully

to keep promising

agreeably to my promise

perform a promise

to fulfil one's promise―keep one's promise―keep one's word―make good one's promise―redeem one's pledge

You promise?

to make a promise secretly