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 -ere
Proto-Germanic *-ārijaz (inherited)
Proto-West Germanic *-ārī (inherited)
Old High German -āri (cognate)
Latin -ārius (derived)
Old Frisian -ere (cognate)
Old Saxon -āri (cognate)

English -er (inherited)
English -ar (inherited)
Old English leogere (affix)
Old English -estre (mention)
Old English castenere (cognate)
Old English galdre (compound)
Old English scipere (affix)
Old English sawere (affix)
Old English tannere (affix)
Old English fuglere (affix)
Old English fugelere (affix)
Old English licettere (affix)
Old English mangere (affix)
Old English casere (affix)
Old English gewritere (affix)
Old English hearpere (mention)
Old English wudere (affix)
Old English tumbere (affix)
Old English biemere (affix)
Old English bymere (affix)
Old English tyhtere (affix)
Old English oferdrincere (affix)
Old English hloþere (affix)
Old English leornere (link)
Old English frihtere (affix)