Resembling a bulrush or having characteristics similar to a bulrush; looking or behaving like a bulrush.
From 'bulrush' combined with the suffix '-like' (Old English, from Proto-Germanic 'lich' meaning 'body' or 'form,' gradually shifting to mean 'resembling'). Standard English formation for creating comparative descriptors.
The suffix '-like' is endlessly productive—you can apply it to almost any noun to create an adjective. What's interesting is that '-like' preserves the original noun form, whereas '-y' transforms it ('bulrush' → 'bulrushy' vs. 'bulrush' → 'bulrushlike'). English lets you choose how dramatically you want to transform your word.
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