擅自
sin6 zi6shàn zì
English
- without permission
- (to do something) without authorisation
粵語 — Cantonese
- 未經批准
Examples
擅自離開
to leave a place without authorisation
考生不得擅自離開試場。
Candidates should not leave the hall without authorisation.
Sources: cc-cedict, rime-cantonese, words.hk