Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Old English æt-
Old English æt (mention)

English at- (inherited)
Old English ætgædere (affix)
Old English ætsamne (affix)
Old English ætiecan (affix)
Old English ætfon (affix)
Old English ætsteall (affix)
Middle English at- (inherited)
Gothic 𐌰𐍄- (cognate)