Rashest

Part of speech: adjective

Definitions

1. The most impulsive decisions made without forethought are the actions that demonstrate a lack of caution and consideration for possible outcomes
2. Actions characterized by excessive hastiness often result in regret due to their unconsidered nature and unpredictable results
3. Showing the greatest degree of impulsiveness, acting with the least amount of careful planning or caution

Etymology: "Rashest" is simply the superlative of "rash", so its history is that of the adjective. The surprise is that the word once praised quickness and vigour rather than recklessness. Its Old English ancestor, probably "ræsċ", belonged to a family of words for moving rapidly, flickering, or glittering, and it descends from a Proto-Germanic root meaning rapid or swift. Cognates across the Germanic languages carry the same sense of agility: Old Norse "rǫskr" meant brave and healthy, and Old Swedish "rasker" meant nimble and fast. The modern Danish and Swedish forms still keep that brisk, energetic flavour. The sense of hastiness that gave rise to the modern meaning appeared in Middle English, where "rash" meant hasty or headstrong. A sense of imprudence grew naturally from that speed: someone who acts quickly is less likely to pause and weigh consequences. The superlative form therefore describes the most hasty and heedless of actions, a meaning that developed out of the older idea of being swift and lively.

Synonyms: most reckless, most hasty, most impulsive, most foolhardy, most imprudent

Antonyms: cautious, careful, prudent, deliberate, thoughtful