i-adjective
Describes a close, familiar relationship between people. Cross-referenced with 親しい (したしい) as the more common reading for this meaning; ちかしい is a less frequent variant.
See also: 親しい (したしい)
彼とはちかしい仲だ。
I have a close relationship with him.
ちかしい友人
I only speak my true feelings to close friends.