Comparative form of 'hasty': more inclined to rush or act without enough thought; moving faster or more urgently.
From 'hasty' + comparative suffix '-er'. 'Hasty' comes from 'haste' + suffix '-y' (having the quality of), and the comparative adds '-er' for comparison.
English has two ways to form comparatives: '-er' for short adjectives ('faster,' 'hastier') and 'more' for longer ones ('more careful')—and the boundary is fuzzy, which is why some words sound awkward one way or another.
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