1. Lacking a capacity to adsorb or cause to accumulate on a surface
   - nonadsorptive

Antonym: adsorbent

• hard up
• hard water
• hard wheat
• hard worker
• hard-and-fast
• hard-baked
• hard-bitten
• hard-boiled
• hard-boiled egg
• hard-cooked egg
• hard-fought
• hard-hitting
• hard-nosed
• hard-of-hearing
• hard-on
• hard-pressed
• hard-shell
• hard-shell clam
• hard-shell crab
• hard-shelled
• hard-skinned puffball
• hard-to-please
• hard-wearing
• hard-won
• hardback