verb

assure

to assure, to guarantee, to reassure

I assure you that everything will be fine.

I assure you that everything will be fine.

She assured him of her full support.

She assured him of her full support.

He assured himself that the door was locked.

He assured himself that the door was locked.

((sb.)) ((that...)) to tell someone confidently that something is true. I assure you that everything will be fine.

((sb.)) ((of sth.)) to make someone certain of something. She assured him of her full support.

((oneself)) ((that...)) to make sure of something. He assured himself that the door was locked.

Synonyms: guarantee, promise, reassure; Antonyms: doubt, question

From Latin 'ad-' (to) + 'securus' (safe, secure). Literally 'to make secure'.

Think of it as 'making someone sure' of something. 'I assure you' means 'I make you sure'.

This page is designed for learning support. Please use it as a learning reference, not as a formal reference.