intimate, close, approach
暱 centers on closeness and intimacy: being near someone, approaching them, or having a close relationship.
暱 combines 日 (sun) with 匿, which likely contributes the sound and carries a sense of hiding or being close. The exact historical development is uncertain.
The sun 日 is hidden 匿 behind clouds, but its warmth still feels close and intimate. This closeness represents intimacy and approach.
For ジツ, imagine the sun getting so close it feels like a jitsu (a made-up word for a warm, intimate ray): jitsu -> ジツ, and the sun's closeness brings intimacy.