I don't know

interjectionUS [ɑ̈ɪ̯(d)oʊ̯̃(ʔ)(t̚)noʊ̯]

Used in response to a question or command in which the target person does not know the answer to or how to respond.
Used to indicate that one is speculating (often used sarcastically when stating the obvious).
Used to express exasperation or incredulity about a given situation or person.UK
Used other than figuratively or idiomatically: see I, don't, know.

Example sentences5944 results

I don't know if I have the time.

I don't know what you mean.