Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Middle English bak
Old English bæc (inherited)
Middle English bac (alter)
Middle English bacc (alter)
Middle English back (alter)
Middle English backe (alter)
Middle English bakke (alter)
Middle English bakk (alter)
Middle English bake (alter)
Middle English abak (link)
Middle English bakbon (link)
Middle English bak side (link)
Middle English bakward (link)
Middle English horsbak (link)
Middle English thornbak (link)
Middle English beli (link)
Middle English behinde (link)
Proto-Germanic *baką (inherited)
Old Swedish nattbakka (derived)
Proto-West Germanic *bak (inherited)
Scots bak (link)
Scots bake (link)

English back (inherited)
Middle English bakke (alter)
Middle English abak (prefix)
Middle English bakkes (affix)
Middle English bakbon (affix)
Middle English thornbak (affix)
Middle English bacoun (mention)
Middle English horsbak (affix)
Indonesian bek (derived)