睚

以眦睚杀人

yǐ zì yá shā rén

to kill sb for a trifle

眦睚

zì yá

see 睚眥|睚眦[ya2 zi4]

睚眦

yá zì

(literary) to glare in anger

睚眦必报

yá zì bì bào

lit. to seek revenge over a dirty look (idiom)