unbreakable

/ənˈbreɪkəbəl/

/ənˈbreɪkəbəl/

Other forms: unbreakably

Something that can't be shattered, cracked, or easily destroyed is unbreakable. If your new cellphone is truly unbreakable, it will hold up no matter how many times you drop it on the floor.

Use this adjective for anything that's physically durable, like the unbreakable glass used for car windshields or the unbreakable plastic bottles that ketchup comes in. It's impossible, or nearly impossible, to break these things. Things that are figuratively unbreakable can't be destroyed either, like the unbreakable bond between twins or the unbreakable secret code used by spies.

Definitions of unbreakable

1. adjective

   impossible to break especially under ordinary usage
   “unbreakable plastic dinnerwear”

   synonyms:

   infrangible

   difficult or impossible to break or separate into parts

   shatterproof, splinterless, splinterproof

   resistant to shattering or splintering

   antonyms:

   breakable

   capable of being broken or damaged

   brickle, brickly, brittle

   having little elasticity; hence easily cracked or fractured or snapped

   crumbly, friable

   easily broken into small fragments or reduced to powder

   short

   tending to crumble or break into flakes due to a large amount of shortening

   delicate, fragile, frail

   easily broken or damaged or destroyed

   frangible

   capable of being broken

   splintery

   subject to breaking into sharp slender pieces