yuān​jia

sweetheart

冤家 yuān​jia
sweetheart noun
a destined love or sweetheart, often used playfully or in Chinese opera

These two are truly a bickering couple.

enemy noun
an enemy or foe

Frequency

Movie subtitles
1.19 per million appears in 1% of films
Written text
2.24 per million

Sources

Definitions
CC-CEDICT