zhī​xīn

intimate

知心 zhī​xīn
intimate adjective
sharing one's innermost thoughts and feelings; describing a close and trusted relationship or person

It is hard to find a true intimate friend in this world.

caring noun
showing deep understanding and sympathy for another person; being heart-to-heart and solicitous

The teacher's heart-to-heart talk cheered him up from his depression.

Frequency

Movie subtitles
1.31 per million appears in 1% of films
Written text
3.28 per million

Sources

Definitions
CC-CEDICT