Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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English foe
Old English ġefāh (inherited)
Old English fāh (mention)
English adversary (link)
English enemy (link)
English opponent (link)
English ally (link)
English friend (link)
English befoe (link)
English bethe (link)
English B (link)
Middle English fo (inherited)
Middle English ifo (mention)
Proto-Germanic *faihaz (inherited)
Middle High German gevēch (cognate)
Proto-West Germanic *faih (inherited)
Proto-Indo-European *peik/k̑- (derived)
Lithuanian pìktas (cognate)
Middle Irish óech (cognate)
Old Frisian fāch (cognate)

English fiend (mention)
English erg (link)
English feud (suffix)
English fey (mention)
English foeman (compound)
English ofay (mention)
English foeship (suffix)
English archfoe (prefix)
English foehood (suffix)
English befoe (affix)
English foeless (suffix)
English foelike (suffix)
Danish fejde (cognate)
Lithuanian piktas (cognate)
Dutch veegte (mention)