meet unexpectedly
邂 centers on a chance, unplanned meeting: encountering someone or something unexpectedly.
邂 combines 辶 (movement) with 解, which likely contributes the sound and the idea of separation or release, suggesting a meeting that breaks the ordinary pattern.
The movement enclosure 辶 wraps around 解 (unravel, release). Picture walking along and suddenly unraveling a surprise encounter: you meet someone unexpectedly.
For カイ, imagine a chance meeting at a dock by the sea: 海 (かい, sea) -> カイ, and the unexpected encounter happens right there.