ir·re·fran·gi·ble 
(ĭr′ĭ-frănjə-bəl)
(ĭr′ĭ-frănjə-bəl)adj.
1. Impossible to break; indestructible: irrefrangible cookware.
2. Physics That cannot be refracted.
ir′re·frangi·bly adv.
- whence
- whencesoever
- whenever
- when/if push comes to shove
- when push comes to shove
- whensoever
- when the chips are down
- when the shit hits the fan
- where
- whereabouts
- whereas
- whereat
- whereby
- wherefore
- wherefrom
- wherein
- whereinto
- whereof
- whereon
- wheresoever
- where the rubber meets the road
- wherethrough
- whereto
- whereunto
- whereupon