TEMERA'RIOUS, adjective [Latin temerarius; from the root of time, tempest, which see. The sense is rushing or advancing forward.] 1. Rash; headstrong; unreasonably adventurous; despising danger; as temerarious folly. 2. Careless; heedless; done at random; as the temerarious dash of an unguided pen. [This word is not much used.]
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI