Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Latin speculor
Latin specula (mention)

English speculation (derived)
English speculate (mention)
English speculative (derived)
Catalan especular (borrowed)
Czech spekulovat (borrowed)
Spanish especulación (derived)
Spanish especular (borrowed)
Spanish especulativo (derived)
French spéculation (derived)
French spéculatif (derived)
French spéculer (borrowed)
Old French especuler (borrowed)
Galician especulación (derived)
Ido spekular (mention)
Italian speculazione (derived)
Italian specchiare (mention)
Italian speculare (mention)
Italian speculativo (derived)
Latin specula (link)
Latin speculativus (suffix)
Latin speculans (mention)
Latin speculatio (affix)
Latin speculabundus (suffix)
Latin speculaturus (mention)
Latin speculatus (mention)
Latin speculandus (mention)
Portuguese especular (borrowed)
Portuguese especulação (derived)