Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
English purchase
Middle English purchasen (inherited)
French pourchasser (cognate)
Old French pur- (mention)
Old French chacer (mention)
Old French porchacier (cognate)
Proto-Indo-European *keh₂p- (root)
Latin pro- (derived)

English sale (link)
English repurchase (prefix)
English purchaser (suffix)
English purchasable (suffix)
English purchaseth (suffix)
English micropurchase (prefix)
English purchasest (suffix)
English prepurchase (prefix)
English postpurchase (prefix)
English purchasability (suffix)
English splurchase (blend)
English purchaseless (suffix)
English unpurchaseable (affix)
English nonpurchase (prefix)
English interpurchase (prefix)
English overpurchase (prefix)
English outpurchase (prefix)