unsportsmanlike (adj.) unsporting (adj.) unspoken (adj.) unspoiled (adj.) unspeakable (adj.) unsparing (adj.) unsound (adj.) unsought (adj.) unsorted (adj.) unsophisticated (adj.) unsolved (adj.) unsolicited (adj.) unsold (adj.) unsociable (adj.) unsmiling (adj.) unskillful (adj.) unskilled (adj.) unsinkable (adj.) unsightly (adj.) unshorn (adj.)