1. Very generous
   "unsparing generosity"
   - lavish, munificent, overgenerous, too-generous, unstinted, unstinting 
2. Not forbearing; ruthless
   "an unsparing critic"

See also: generous, inclement, unsparingly

• wind rose
• wind scale
• wind shear
• wind sleeve
• wind tee
• wind tunnel
• wind turbine
• wind vane
• wind-chill factor
• wind-fanner
• windage
• Windaus
• windbag
• windblown
• windbreak
• windbreaker
• windburn
• windburned
• windburnt
• windcheater
• windchill
• winded
• winder
• windfall
• windfall profit