#fuerza# force, power, strength; #a — de# by dint of; #— es# it is necessary, it must perforce
#fuga# flight
#fugaz# fleeting
#fulano# such a one; #un tal —# Mr. So-and-so
#fúlgido# bright, resplendent
#fundado# well founded
#fundar# found, base
#funesto# fatal, sad; #el fin os llega —# a disastrous end awaits you
#furia# fury, rage
#furioso# furious, raging