English forwarn

← Old English forwærnan (inherited)

← Old English forwoernan (mention)

← Old English forwiernan (mention)

← English for (prefix)

← English warn (prefix)

← Middle English forwernen (inherited)

← Proto-Germanic *fra- (inherited)

← Proto-Germanic *fur- (mention)

← Proto-Germanic *far- (mention)

← Proto-Germanic *warnijaną (mention)

← Proto-Indo-European *wer- (derived)