adj. 25B6; adjective SHATTERPROOF, indestructible, imperishable, durable, long-lasting; toughened, sturdy, stout, resistant, hard-wearing, heavy-duty.
fragile.
UNBREAKABLE
Meaning of UNBREAKABLE in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012