The superlative form of broomy, meaning most resembling or full of broom plants.
From broom (the plant) + -y (adjective suffix) + -est (superlative suffix). Broom comes from Old English 'brom', related to Germanic roots meaning a bushy plant used for sweeping.
This word shows how English takes humble plant names and builds an entire word family—broom went from being just a shrub you swept with to describing anything that looks or feels like that plant, which is how many of our most common adjectives were born.
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