←
Old English þearf (cognate)
←
Proto-Germanic *þarbō (derived)
←
Proto-Indo-European *táwros (derived)
←
Icelandic þörf (cognate)
←
Old Norse tarfr (derived)
←
Old Norse þjórr (cognate)
←
Old Norse þǫrf (derived)
←
Proto-Semitic *ṯawr- (derived)
←
Old Irish tarb (derived)