Meaning

adjective lacking in security or safety

adjective involving or causing danger or risk; liable to hurt or harm

adjective not safe from attack

originEtymology tree Proto-Indo-European *h₂ent- Proto-Indo-European *-s Proto-Indo-European *h₂éntsder. Proto-Germanic *anda- Proto-West Germanic *anda- Old English and- Old English on- Middle English on- English un- English safe English unsafe From un- (reversive prefix) + safe.

Etymology from Wiktionary, CC BY-SA 3.0