Word: 仇 (chóu, qiú)

两斗皆仇，两和皆友

liǎng dòu jiē chóu, liǎng hé jiē yǒu

if both fight, both become enemies; if both make peace, both become friends

亲不择骨肉,恨不记旧仇

qīn bùzé gǔròu,hèn bú jì jiù chóu

in affection don't choose only blood relatives, in hatred don't remember old grudges

仇可解不可结

chóu kě jiě bùkě jié

a grudge can be untied, not tied tighter

你们俩之间有什么仇？

Nǐmen liǎ zhījiān yǒu shénme chóu?

What enmity is there between you two?

别把仇带到下一代身上。

Bié bǎ chóu dài dào xiàyídài shēnshang.

Don't pass your hatred on to the next generation.

夫妻没有隔夜的仇

fūqī méiyǒu géyè de chóu

a couple holds no grudge overnight

念完了经打和尚，用得着是亲，用不着是仇

niàn wánle jīng dǎ héshang, yòngdezháo shì qīn, yòngbùzháo shì chóu

after the chanting, beat the monk: if useful, kin; if not, an enemy