1) An impetuous person 2) Brainish 3) Brash 4) Excitable 5) Fiery 6) French word used in English 7) Hasty 8) Having great impetus 9) Hotheaded 10) Hurried 11) Impatient 12) Impulsive 13) Incautious 14) Irresponsible 15) Madcap 16) Marked by violent force 17) Moving with great force 18) Offhand 19) Precipitate Found on https://www.crosswordclues.com/clue/impetuous
• (a.) Vehement in feeling; hasty; passionate; violent; as, a man of impetuous temper. • (a.) Rushing with force and violence; moving with impetus; furious; forcible; violent; as, an impetuous wind; an impetuous torrent. Found on http://thinkexist.com/dictionary/meaning/impetuous/
Im·pet'u·ous adjective [ French impetueux , Latin impetuosus . See Impetus .] 1. Rushing with force and violence; moving with impetus; furious; forcible; violent; as, an impetuous wind; an impetuous torrent. « Went pouring forward with impetuous Found on http://www.encyclo.co.uk/webster/I/20
of, pertaining to, or characterized by sudden or rash action, emotion, etc.; impulsive: an impetuous decision; an impetuous person. · having great impetus; moving with great force; violent: the impetuous winds. Found on https://www.infoplease.com/dictionary/impetuous