←
Old English þorn (cognate)
←
English thorn (cognate)
←
Old French tor (derived)
←
Middle Low German tōrn (derived)
←
Middle Low German tōren (mention)
←
Old Swedish þorn (derived)
←
Ancient Greek τύρρις (derived)
←
Ancient Greek τύρσις (mention)
←
Proto-Indo-European *(s)ter- (mention)
←
Old Norse turn (inherited)
←
Old Norse þorn (derived)
→
English tower (cognate)
→
English thorn (cognate)
→
Finnish torni (borrowed)