| Answer | Crossword Clue |
|---|---|
| SLAM | Close harder than hard |
| harden | become hard or harder |
| harden | to make hard or harder |
| hardening | Make or become hard or harder |
| hardened | Having become or been made hard or harder |
| hardens | to make hard or harder; to strengthen, reinforce, toughen, or stiffen |
| harden | to make hard or harder; to strengthen, reinforce, toughen, or stiffen |
