Where does “fǣhþ” come from?

fǣhþ (Old English) comes from Proto-West Germanic faihiþu, from Proto-West Germanic -iþu, from Proto-Germanic -iþō, from Proto-Indo-European -iteh₂ — -th.

Ancestry of “fǣhþ”, step by step

StepLanguageWordMeaning
1Proto-West Germanicfaihiþuenmity, hostility; feud
2Proto-West Germanic-iþuForms abstract nouns from verbs, adjectives or...
3Proto-Germanic-iþō-ness, -th
4Proto-Indo-European-iteh₂-th
Every word from Proto-Indo-European -iteh₂ →Every word from Proto-Germanic -iþō →Every word from Proto-West Germanic -iþu →