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 *(s)tewd-

→ English obtuse (root)
→ English obtuse (derived)
→ English study (root)
→ English study (derived)
→ English study (derived)
→ English student (root)
→ English obtund (root)
→ English obtundent (root)
→ English obtunder (root)
→ English studio (root)
→ English contusion (root)
→ English obtuseness (root)
→ English etude (root)
→ English pertussis (root)
→ English ratatouille (mention)
→ English stot (root)
→ English stot (derived)
→ English obtusely (root)
→ English unobtuse (root)
→ English obtundation (root)
→ English tussis (root)
→ English obtusity (root)
→ English subobtuse (root)
→ English nonobtuse (root)
→ English obtundedness (root)
→ Afrikaans studeer (root)
→ Asturian tos (mention)
→ Catalan tos (mention)
→ German stoßen (mention)
→ German Stößel (derived)
→ German niederstoßen (derived)
→ Spanish tos (mention)
→ Persian تند (inherited)
→ French toux (mention)
→ Friulian tos (mention)
→ Irish tit (root)
→ Scottish Gaelic tuit (root)
→ Ancient Greek Τυνδάρεος (derived)
→ Manx tuitt (root)
→ Indonesian studi (derived)
→ Italian tosse (mention)
→ Latin studeo (root)
→ Latin studeo (derived)
→ Latin tundir (derived(la/es))
→ Latin tundo (root)
→ Latin tundo (derived)
→ Latin tussis (mention)
→ Latin tudes (root)
→ Latin tudes (derived)
→ Portuguese tosse (mention)
→ Romanian tuse (mention)
→ Russian стужа (derived)
→ Sanskrit तुद् (inherited)
→ Sanskrit तुदति (inherited)
→ Old Irish dotuit (root)
→ Old Irish dotuit (derived)
→ Albanian tund (mention)
→ Albanian shtyj (derived)
→ Old Armenian թնդամ (mention)
→ Yiddish שטודיע (derived)