1. Tasting or smelling like vinegar
   - acetose, acetous, vinegary 
2. Having a sour disposition; ill-tempered
   - vinegary

See also: ill-natured, sour, vinegarishness

• unsensible
• unsent
• unsentimental
• unsentimentally
• unserviceable
• unservile
• unset
• unsettle
• unsettled
• unsettlement
• unsex
• unsexed
• unsexy
• unshackle
• unshackled
• unshaded
• unshadowed
• unshakable
• unshakably
• unshakeable
• unshaken
• unshaped
• unshapely
• unshapen
• unshared