unscrupulous (adj.) unscriptural (adj.) unscramble (v.) unschooled (adj.) unscathed (adj.) unsavory (adj.) unsaturated (adj.) unsatisfied (adj.) unsatisfactory (adj.) unsatiable (adj.) unsanitary (adj.) unsalted (adj.) unsaid (adj.) unsafe (adj.) unruly (adj.) unruffled (adj.) unromantic (adj.) unroll (v.) unrivalled (adj.) unripe (adj.)