Rushing with force and violence; moving with impetus; furious; forcible; violent; as, an impetuous wind; an impetuous torrent.

Vehement in feeling; hasty; passionate; violent; as, a man of impetuous temper.

marked by violent force; "impetuous heaving waves"

characterized by undue haste and lack of thought or deliberation; "a hotheaded decision"; "liable to such impulsive acts as hugging strangers"; "an impetuous display of spending and gambling"; "madcap escapades"; (`brainish' is archaic)

Required to "follow-up" or move forward automatically if/when an opposing enemy element is destroyed, recoils, flees, or breaks off. An impetuous element moves forward the depth of its base in pursuit. Knights, Scythed Chariots, and Warband are designated as "impetuous" troops in DBA.