Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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English planar
Proto-Indo-European *pleh₂- (root)
Proto-Indo-European *pleh₂- (derived)
Latin plānus (derived)

English flat (link)
English plane (link)
English plain (link)
English planarize (suffix)
English coplanar (prefix)
English planarity (suffix)
English interplanar (prefix)
English nonplanar (prefix)
English exoplanar (prefix)
English periplanar (prefix)
English quasiplanar (prefix)
English multiplanar (prefix)
English outerplanar (compound)
English extraplanar (prefix)
English planarization (suffix)
English biplanar (prefix)
English planarly (suffix)
English uniplanar (prefix)
English diplanar (prefix)
English complanar (prefix)
English halfplanar (compound)
English echoplanar (compound)
English hyperplanar (prefix)
English plabic (blend)
English triplanar (prefix)
English monoplanar (prefix)
English intraplanar (prefix)
English microplanar (prefix)
English equiplanar (prefix)
English curviplanar (prefix)
English quadriplanar (prefix)
Italian planare (borrowed)