1620s, from French futilité or directly from Latin futilitatem (nominative futilitas) "worthlessness, emptiness, vanity," from futilis "vain, worthless" (see futile). Hence, jocular futilitarian (1827, n. and adj.); futilitarianism.
fustian
fustigate
fusty
futhorc
futile
futility
futon
future
futures
futurism
futuristic