Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Serbo-Croatian ljeto
Proto-Indo-European *leh₁tom (derived)
Proto-Slavic *lěto (inherited)

Old English liþa (cognate)
Serbo-Croatian proljeće (compound)
Serbo-Croatian stoljeće (affix)
Serbo-Croatian proljetje (compound)
Serbo-Croatian ljetopis (link)