Meaning

noun a small secluded room

adjective offering safety; well protected or concealed

adjective fitting closely but comfortably

originFrom dialectal English snug (“tight, handsome”), perhaps from Old Norse snøggr, from Proto-Germanic *snawwuz (“short, quick, fast”). Compare Icelandic snöggur (“smooth”), Danish snög (“neat”), Swedish snygg (“handsome, nice-looking”). Compare also English snudge (“to nestle, remain snug and quiet”).

Etymology from Wiktionary, CC BY-SA 3.0