Elementary (A2)
IPA: /ˌʌnəˈpruːvd/
KK: /ʌnəˈpruvd/
Definition
Not accepted or allowed by an authority or official body.
Example
The project was delayed because it was based on unapproved plans.
Conversation

Did you hear about that unapproved protest happening downtown?

Yeah, I saw it on social media. It seems pretty risky.

I know! It's surprising they would allow an unapproved event like that.

Right? I wonder how many people will actually show up.
Synonyms & Antonyms
Synonyms
unauthorized
unofficial
prohibited
Antonyms
approved
sanctioned
authorized
Root Explanation
Unapproved → It is formed from "un-" (meaning not) and "approved" (from Latin "approbare", meaning to test or prove). The word "unapproved" means not having been tested or proven acceptable.
Memory Tip
Think of 'not' ('un-') having been 'proven acceptable' ('approved') — that's why unapproved means something that hasn't received approval.
Visually Confused Words
unproved
unroved
approve
unreproved
unprovoked
unprovided
unimproved
approvedly