Causing or tending to cause annoyance; annoying or irritating.
From annoy + -ous (suffix meaning 'full of' or 'characterized by'). This archaic form parallels how English could create 'fulsome' from 'full,' though modern English prefers 'annoying' or 'annoyed.'
This word shows how English speakers loved creating -ous adjectives in the 1600s-1800s, but 'annoyous' lost the competition to simpler words like 'annoying'—a reminder that not every possible word survives.
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