noun. The character of being rash; inconsiderate or presumptuous haste; headstrong precipitation in decision or action; temerity; unwarranted boldness.

noun. A rash act; a reckless or foolhardy deed.

noun. Synonyms Rashness, Temerity. Rashness has the vigor of the Anglo-Saxon, temerity the selectness and dignity of the Latin. Temerity implies personal danger, physical or other: as, the temerity of undertaking to contradict Samuel Johnson; temerity in going upon thin ice. Rashness is broader in this respect. Roshness goes by the feelings without the judgment; temerity rather disregards the judgment. Temerity refers rather to the disposition, rashness to the conduct. See adventurous.

noun. The quality or state of being rash.

noun. The quality of state of being rash; inconsiderate or presumptuous haste; headstrong precipitation in decision or action; temerity; unwarranted boldness.

noun. the trait of giving little thought to danger

noun. the trait of acting rashly and without prudence

"Afforded no opportunity on that journey to kill Claudius, he discovers the unexpected, an occasion to make use of what he calls rashness:"

care  

caprice  carelessness  cowardice  extravagance  folly  

abruptness  alacrity  carelessness  expeditiousness  feverishness