Question 1

What does "think twice" mean?

Accepted Answer

To reconsider an action carefully before committing to it, especially if it might be risky.

Question 2

How do you use "think twice" in a sentence?

Accepted Answer

You should think twice before signing any contract without legal advice.

Question 3

Is "think twice" formal or informal?

Accepted Answer

"think twice" is register-neutral — appropriate in both casual and formal contexts. Used as advice to pause and reflect before taking an action that might have negative consequences.