I don’t know how, why, etc…

phrase

Used to express that the speaker is uncertain about the method, reason, or details of something.

I don't know how he fixed the car so quickly.

Definition 1 of 4

Pro Tip 1/3

Use when you're unsure about specific details or processes.

I don't know how they calculate these figures.

Pro Tip 2/3

Shows that you're aware of your lack of knowledge on the subject.

I don't know why this happens every time.

Pro Tip 3/3

Can be used to prompt others to provide information or an explanation.

I don't know when she arrived; do you?

Humans forget easily. That's why you should download WordUp: Smart reminders, word games, AI practice, and much more!

As you browse the web instantly look up words you don’t know.