impetuous

adjectives

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)
brainish, hotheaded, impetuous, impulsive, madcap, tearaway
is derived from
impetuousness
is derived from
impetuosity
marked by violent force
"impetuous heaving waves"
impetuous
is similar to
characterized by or full of force or strength (often but not necessarily physical)
"a forceful speaker"; "a forceful personality"; "forceful measures"; "a forceful plan for peace"
forceful