1. Involving opposition, often hostile

Encyclopedia: Adversarial

• unsmooth
• unsmoothed
• unsnarl
• unsnarled
• unsnarling
• unsociability
• unsociable
• unsociableness
• unsociably
• unsocial
• unsoiled
• unsold
• unsolder
• unsoldierly
• unsolicited
• unsoluble
• unsolvability
• unsolvable
• unsolved
• unsophisticated
• unsorted
• unsought
• unsound
• unsoundable
• unsounded