fornido, -a, robust, thickset
fórmula, formula
fortalecido, -a, strengthened
fortaleza, strength, fortification
fortuna, fortune;
por ——, luckily
forzar, to force, violate, overthrow
forzosamente, necessarily
forzoso, -a, necessary, unavoidable, exacting
fosco, -a, frowning, dark, sullen