Answer | Crossword Clue |
---|---|
RARER | Tougher to locate |
HEAVIER | Tougher to tote |
RARER | Tougher to find |
STEEPER | Tougher to climb |
harden | to become harder, tougher, stiffer, etc. |
hardens | to become harder, tougher, stiffer, etc. |
toughen | to make or become tough or tougher |