Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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English murky
English murk (suffix)
English y (suffix)
Middle English mirky (inherited)
Old Norse myrkr (cognate)
Russian мрак (cognate)
Serbo-Croatian мра̑к (cognate)

English murk (link)
English murkily (suffix)
English murkiness (suffix)
Arabic طحلب (link)