未便

cǐ shì shàng jí wú zhǐ shì wèi biàn shàn zì chǔ lǐ

此事上级无指示，未便擅自处理。

I cannot do it without authorization since there is no instruction from the higher-ups.

wèi biàn lì kè dá fù

未便立刻答复

find it difficult to give an immediate reply

wèi biàn qiú zhù

未便求助

find it hard to ask for help

wèi biàn tài guò zháo jí

未便太过着急。

It's no good being overhasty.