wèi / jīng / yǔn / xǔ / shàn / zì / jìn / rù / huì / yì / shì / wèi / miǎn / yǒu / xiē / jiàn / yuè

未经允许擅自进入会议室，未免有些僭越。

Entering the conference room without permission was somewhat overstepping one's authority.