Full of clutter; messy, disorganized, or containing too many things scattered around.
From 'clutter' with the adjectival suffix '-y' or '-ery,' which transforms nouns into adjectives meaning 'having the quality of' or 'characterized by.' This suffix is one of the most productive in English.
Adding '-y' to nouns to make adjectives is so common in English that we barely notice it (think 'dusty,' 'lucky,' 'noisy'), but it's been a standard word-building technique for over a thousand years.
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