from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Constructed or designed to withstand blows or jarring.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Made sturdily enough to withstand knocks and shocks without being damaged.
- adj. Protected from imparting electric shocks.
- v. To protect from imparting electric shocks.
shock + -proof (Wiktionary)