for sure
- idiom
- Informal
- And we can't always say for sure what's going on with them.
- know for sure
- say for sure
- one thing for sure
I'm not I, I don't know for sure about Travis.
- I'm not I, I don't know for sure about Travis.
- And I'll say The Who for sure hasn't been super clear.
- Some of it is threatening for sure, you know, and, and daunting.
- Like, I thought for sure, like, that was it.
- But I don't know for sure what will happen now.
- And we can't always say for sure what's going on with them.
- One thing I did for sure here was Apple buying Netflix.
- Like it's materialistic for sure or experience based.
Examples
-
Make no mistake about it: the choice for sure is between two visions of the world.
Academic text (2003) -
But I don't know for sure what will happen now.
-
And only then will we know for sure whether the strategy is useful.
Academic text (1991) -
No one knows for sure whether the cause was water levels or another factor.
Academic text (2011) -
One of the ways we know for sure that it's fiction is when animals or insects talk.
Academic text (2012) -
I think that's the simple answer, but for sure it's not easy.
-
Well, he married up, that's for sure.
-
But one thing I know for sure, that little girl now has the entire city rootin' for her.
-
It's a shock for sure, but I don't have any hard feelings.
-
I will be there at 3 PM for sure, so don't worry about me being late.
Synonyms
Showing that something is true or will happen without any doubt
Completely and without any doubt
To say that something is true without any doubt
To say certainly or definitely
Without any doubt
To be completely sure and have no doubt
In a clear way that leaves no doubt
Without any doubt
In a way that is certain
Without any doubt and with confidence
Says that something is certainly true
Clearly and without doubt
In a way that shows there is no doubt
Clearly true and cannot be denied
It is clearly true and cannot be doubted
Completely certain that something will happen
Clearly and without any doubt
Certain to happen
How Certain
Surface Forms
Morphology
for + sure
The meaning 'without any doubt' is directly derivable from 'sure' (certain) with 'for' functioning as a common prepositional/colloquial marker that forms an adverbial phrase; a B1 learner who knows 'sure' will readily infer 'for sure' = certainly. This composition follows a straightforward English pattern (preposition/adverbial marker + adjective → adverbial sense) and has clear cross-linguistic parallels, so it is transparent.
Etymology
For sure may come from people shortening the older phrase 'for certain' into a quick reply, using for + sure to show something was certain. That's why when someone says for sure today they mean 'without any doubt' or 'definitely'.