Irresuscitable is a word that describes something that is impossible to revive or bring back to life. Some synonyms for this word include inanimate, lifeless, dead, unresponsive, defunct, extinguished, and lifeless. Other synonyms can include unrevivable, nonreversible, unrecoverable, and beyond repair. These words can be used to describe anything from a dead plant or a broken machine to a failed business or a lost relationship. If something is described as irretrievable, it means that it cannot be recovered or salvaged in any way. Knowing synonyms for this word can help to better communicate its meaning in different contexts.