Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Middle English -ous
Old French -ous (borrowed)
Old French -us (mention)
Old French -eus (mention)
Latin -ōsus (derived)

English -ous (inherited)
Middle English luxurious (affix)
Middle English glorious (affix)
Middle English desirous (affix)
Middle English perilous (affix)
Middle English squamous (affix)
Middle English gracious (affix)
Middle English vicious (affix)
Middle English injurious (affix)
Middle English cavernous (affix)
Middle English rebellious (affix)
Middle English vertuous (affix)
Middle English noyous (affix)
Middle English fumous (affix)
Middle English venemous (affix)
Middle English monstruous (affix)
Middle English spumous (affix)
Middle English envenymous (affix)
Middle English toilous (affix)
Middle English crymynous (affix)
Middle English saturnous (affix)
Middle English bataillous (affix)
Middle English mountuous (affix)
Middle English merveilous (affix)
Middle English myschevous (affix)
Middle English beautevous (affix)
Middle English malencolious (affix)
Middle English ruynous (affix)
Middle English angwischous (affix)
Middle English charjous (affix)
Middle English disdeynous (affix)
Middle English deyntevous (affix)
Middle English anoyous (affix)