I Make Confident Bet He'll Adjective ʃʊə(R ʃɔː(R

• ‘is that john over there?’ ‘i'm not sure’.
• you don't sound very sure.
• i'm pretty sure (that) he'll agree.
• are you sure you don't mind?

sure

1. confident that you know something or that you are right
• SYNONYM certain
  https://www.oxfordlearnersdictionaries.com/definition/english/certain_2
• ‘Is that John over there?’ ‘I'm not sure’.
• You don't sound very sure.
• I'm pretty sure (that) he'll agree.
• Are you sure you don't mind?
• I’m sure he’s still alive.
• I hope you are sure of your facts.
• Are you sure about that?
• Ask me if you're not sure how to do it.
• I'm not sure whether I should tell you this.
• not exactly/entirely/absolutely/really sure
• I still wasn't even sure who I was talking to.
• I like this bit, but I'm not so sure about that one.

Extra Examples

• What makes you so sure she'll come back to you?
• I'm quite sure (that) I left my bag here.
• Potts was confident of taking the American title, but less sure about the world championship.
2. certain that you will receive something or that something will happen
• You're always sure of a warm welcome there.
• We could not be sure of financial support.
• England must win this game to be sure of qualifying for the World Cup.
3. certain to do something or to happen
• The exhibition is sure to be popular.
• It's sure to rain.
• You’re sure to get lost if you don’t keep to the path.
• She's sure to be picked for the team.
4. that can be trusted or relied on
• It's a sure sign of economic recovery.
• There's only one sure way to do it.
• He is a sure bet for the presidential nomination (= certain to succeed).
• I told my friends that our winning was a sure thing.
5. steady and confident
• We admired her sure touch at the keyboard.
6. used to tell somebody to do something
• Be sure to give your family my regards.
• Be sure to check out our website.
7. without doubt
• No one knows for sure what happened.
• I think he'll be back on Monday, but I can't say for sure.
• One thing is for sure—it's not going to be easy.
• ‘Will you be there?’ ‘For sure.’
8. something that is likely to happen, to succeed or to be suitable
• He's a good bet to earn a spot on the US team.
• Clothes are a safe bet as a present for a teenager.
• The movie looks like a sure bet for Best Film.
9. to do something in order to be certain that something else happens
• Make sure (that) no one finds out about this.
• They scored another goal and made sure of victory.
• Our staff will do their best to make sure you enjoy your visit.
• To make doubly sure they would not be disturbed she turned the key in the lock.
10. to check that something is true or has been done
• She looked around to make sure that she was alone.
• I think the door's locked, but I'll just go and make sure.
11. very confident
• She seems very sure of herself.
12. used to say ‘yes’ to a suggestion or request
• ‘Are you coming?’ ‘Sure thing.’
13. used to admit that something is true
• He is intelligent, to be sure, but he's also very lazy.

Word Origin

• Middle English: from Old French sur, from Latin securus ‘free from care’.