unsafe//ʌnˈseɪf//A2Frequency Level 11NeutralAdjectiveunsafeCanonical formmore unsafeComparativemost unsafeSuperlative1Not safe; involving or causing danger or risk.It is unsafe to swim in this river.2Not providing security or protection from harm.This old bridge is unsafe for heavy vehicles.SynonymdangeroushazardousriskyAntonymsafesecure