unbreakable• Without a doubt, this stuff is unbreakable.• His hand sliddownwards, holding hers in a grip that was suddenly unbreakable.• an unbreakablebottle• Prisoner, tell me who was it that brought this unbreakablechain?• Even the unbreakableconfidence of the band turned into surprise.• Even supporters such as Lipton do not believe Rabin's work will create a code that is unbreakable for ever.• Make sure your patio doors are made of unbreakableglass.• It was patriarchal on account of its powerful family links, the long unbreakable ligatures of ancestor-worship.• Deadlock, total and seemingly unbreakable, obtained both at sea and on the Western Front.• Twirl the Plate Everyone sits in a circle with an unbreakable plate in the centre.• a virtually unbreakablevacuumflask