Old Norse þorsti

← Proto-Germanic *þurstuz (inherited)

← Proto-Indo-European *ters- (root)

← Proto-Indo-European *ters- (derived)

→ English thirst (cognate)

→ Danish tørst (mention)

→ Faroese tosti (inherited)

→ Icelandic þorsti (inherited)

→ Norwegian Bokmål tørst (derived)

→ Norwegian Bokmål tørste (derived)

→ Norwegian Nynorsk tørste (derived)