Vigoureux.
ETYM Greek, from en in + ergon work. Related to Energy.
1. Possessing or exerting or displaying energy.
2. Working hard to promote an enterprise; SYN. gumptious, industrious, up-and-coming.
Characterized by or full of force or strength (often but not necessarily physical).
1. Having great power or force or potency or effect
2. Leading to many or important deductions