Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Proto-Indo-European *pekʷ-

→ English pumpkin (root)
→ English cook (root)
→ English cook (inherited)
→ English cook (root)
→ English melon (root)
→ English apricot (root)
→ English Pepsi (root)
→ English kitchenette (root)
→ English kitchen (root)
→ English kitchen (derived)
→ English kiln (root)
→ English culinary (root)
→ English precocious (root)
→ English biscuit (root)
→ English cuisine (root)
→ English dyspepsia (root)
→ English terracotta (root)
→ English decoction (root)
→ English dyspeptic (root)
→ English concoction (root)
→ English concoct (root)
→ English pepo (root)
→ English ricotta (root)
→ English precocity (root)
→ English peptic (root)
→ English precociousness (root)
→ English decoct (root)
→ English charcuterie (root)
→ English haute cuisine (root)
→ English coctile (root)
→ Old English coc (derived)
→ Catalan coure (derived)
→ Cimbrian khochan (root)
→ Czech pečárka (derived)
→ Welsh cog (root)
→ Welsh cegin (root)
→ Welsh poeth (root)
→ Welsh poeth (derived)
→ Welsh coginio (root)
→ Welsh coginio (derived)
→ Welsh popty (root)
→ Welsh cogydd (root)
→ Welsh cogyddes (root)
→ Welsh pobi (root)
→ German kochen (root)
→ Lower Sorbian pjac (derived)
→ Middle Dutch coken (root)
→ Spanish cocer (mention)
→ Spanish dispepsia (root)
→ Persian پختن (derived)
→ Persian پزیدن (mention)
→ Finnish kokata (root)
→ Faroese kóka (root)
→ French cuire (derived)
→ Old French cuire (derived)
→ Irish cistin (derived)
→ Ancient Greek πέσσω (root)
→ Ancient Greek πέσσω (mention)
→ Ancient Greek πέσσω (mention)
→ Ancient Greek ὀπτός (root)
→ Hindi पक्व (root)
→ Hindi पक्ति (root)
→ Hindi पक्ता (root)
→ Icelandic kokka (root)
→ Italian cuocere (derived)
→ Italian dispepsia (root)
→ Kalasha pačék (inherited)
→ Latin coquo (mention)
→ Latin Copori (derived)
→ Luxembourgish kachen (root)