Resembling, containing, or covered with broom plants; having the characteristics of broom.
From broom + -y (adjective suffix making nouns into adjectives). Common pattern: broom → broomy, like bush → bushy.
The -y adjective suffix is one of English's most productive patterns—it can be attached to almost any noun to create an adjective, which is why children instinctively understand words they've never heard before, like 'broomish' or 'broomlike'.
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