Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Finnish teoreettinen
German theoretisch (cognate)
English theoretical (cognate)
Finnish theōrēticus (suffix)
Finnish inen (suffix)
Swedish teoretisk (borrowed)

Finnish tietoteoreettinen (mention)
Finnish lukuteoreettinen (affix)
Finnish teoreettisesti (affix)
Finnish teoreettisuus (affix)