IPA: /ˈsʌnˌbæθ/
KK: /sʌnˌbæθ/
A period of time spent lying in the sun to get a tan or enjoy the warmth.
After a long week, I decided to take a sunbath at the beach.
Sunbath → It is formed from "sun" (from Old English "sunne", meaning the star that provides light and warmth) and "bath" (from Old English "baþ", meaning a washing or soaking). The word "sunbath" refers to the act of soaking in sunlight, typically for relaxation or tanning.
Think of soaking in the warm light of the 'sun' while enjoying a 'bath' — that's what a sunbath means.