Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Ancient Greek ὀρθός
← Proto-Hellenic *ortʰwós (inherited)
← Proto-Indo-European *h₃r̥dʰwós (inherited)
← Proto-Indo-European *h₃erdʰ- (mention)
← Latin arduus (cognate)
← Sanskrit ऊर्ध्व (cognate)

→ English orthodox (mention)
→ English anorthite (mention)
→ English orthography (mention)
→ English orthoepy (derived)
→ English ortho- (derived)
→ English orthopnoea (mention)
→ English orthodoxy (mention)
→ English orthomorphic (mention)
→ English orthopedia (mention)
→ English orthian (mention)
→ Catalan ortografia (mention)
→ German orthodox (mention)
→ Greek ορθοδοξία (mention)
→ Greek ορθο- (derived)
→ Spanish orto- (mention)
→ Finnish orto- (mention)
→ French ortho- (derived)
→ French orthodoxie (mention)
→ French orthodoxe (mention)
→ French orthographie (mention)
→ French orthodontie (derived)
→ Irish ortadocsach (mention)
→ Ancient Greek ὀρθοέπεια (affix)
→ Ancient Greek ὀρθόπνοια (mention)
→ Ancient Greek ὀρθόω (affix)
→ Ancient Greek ὀρθῶς (affix)
→ Ancient Greek ὀρθόδοξος (affix)
→ Hungarian ortodox (mention)
→ Hungarian ortopédia (derived)
→ Italian ortografia (derived)
→ Italian orto- (mention)
→ Japanese オルト (borrowed)
→ Kazakh ортопедия (derived)
→ Kazakh ортоклаз (derived)
→ Latin arduus (cognate)
→ Latvian rast (cognate)
→ Latvian ortogrāfija (mention)
→ Translingual Orthoptera (derived)
→ Translingual Orthonectida (derived)
→ Translingual Orthogastropoda (derived)
→ Translingual Orthoceras (derived)
→ Translingual Orthogenya (derived)
→ Translingual Orthorrhapha (derived)
→ Norwegian Bokmål ortografi (mention)
→ Norwegian Bokmål anortositt (derived)
→ Norwegian Nynorsk ortografi (mention)
→ Norwegian Nynorsk anortositt (derived)
→ Portuguese ortografia (mention)
→ Russian правописание (mention)
→ Sanskrit ऊर्ध्व (cognate)