I give my word
Definitions
A formal promise or assurance that one will do something.
A solemn declaration intended to guarantee the truth or fulfillment of a commitment.
Examples
I give my word that I will be there on time for the meeting.
You can trust me with this secret; I give my word that I won't tell anyone.
I give my word that I will finish the project by the end of the week.
Synonyms
I promise I swear I guarantee I pledge I vow I commit I assure you
Antonyms
I retract I renege I break my promise I withdraw I disavow I back out I waffle