1. Sour or bitter in taste
   - acerbic, astringent 
2. Harsh or corrosive in tone
   - acerbic, acid, acrid, bitter, blistering, caustic, sulfurous [N. Amer], sulphurous [Brit, Cdn], virulent, vitriolic, sulphureous [Brit]

See also: sour, unpleasant

• air well
• air-breathing
• air-con
• air-condition
• air-conditioned
• air-cool
• air-cooled
• air-dried
• air-dry
• air-filled
• air-intake
• air-raid shelter
• air-slake
• air-sleeve
• air-to-air
• air-to-air missile
• air-to-ground
• air-to-ground missile
• air-to-surface
• air-to-surface missile
• airborne
• airborne patrol
• airborne transmission
• airbrake
• airbrush