Sure
/ʃʊər/
Definitions
2 meaningsFree from doubt; certain.
/ʃʊər/
Are you sure you locked the door?
💡 Simply: When you're sure, it means you *know* something is true and you don't have any doubts. Like, if you're sure the sun will rise tomorrow because it always does.
👶 For kids: When you're sure, it means you know something for a fact!
More Examples
I am sure that I saw him there.
She seemed very sure of her answer.
How It's Used
"I'm sure that's the right way."
"The evidence provided is sure to be examined."
Used to express agreement or assent; certainly.
/ʃʊər/
Used to express agreement or assent.
"Can you pass the salt?" "Sure."
💡 Simply: Saying 'sure' is like saying 'yes' in a friendly way. It means you agree or are happy to do something. Like, if someone asks if you want a cookie, you could say, 'Sure!'
👶 For kids: When you say 'sure', it means 'yes'!
More Examples
"Are you coming to the party?" "Sure!"
I'll be sure to do that.
How It's Used
"Do you want to go to the park? Sure!"
""Can you help me with this?" "Sure, no problem.""
Synonyms & Antonyms
Idioms & expressions
to be sure
Certainly; undoubtedly. Often used to concede a point while also offering a counterpoint.
"To be sure, it's a difficult task, but we can overcome it."
make sure
To ensure or confirm something.
"Make sure you lock the door when you leave."
From Middle English *seure*, from Old French *seur*, from Latin *securus* ('free from care, secure'), from *se* ('without') + *cura* ('care').
Historically used in similar contexts, with 'to be sure' appearing in formal writing to concede a point before presenting a counter-argument. Its simplicity and broad usage make it timeless.
Memory tip
Think of a 'secure' lock – when it's locked, you're sure it's secure.
Word Origin
"free from care, secure"