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irreversible

[ ir-i-vur-suh-buhl ]
/ ˌɪr ɪˈvɜr sə bəl /
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adjective

not reversible; incapable of being changed: His refusal is irreversible.

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“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.

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Origin of irreversible

First recorded in 1620–30; ir-2 + reversible

OTHER WORDS FROM irreversible

ir·re·vers·i·bil·i·ty, ir·re·vers·i·ble·ness, nounir·re·vers·i·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for irreversible

British Dictionary definitions for irreversible

irreversible
/ (ˌɪrɪˈvɜːsəbəl) /

adjective

not able to be reversedthe irreversible flow of time
not able to be revoked or repealed; irrevocable
chem physics capable of changing or producing a change in one direction onlyan irreversible reaction
thermodynamics (of a change, process, etc) occurring through a number of intermediate states that are not all in thermodynamic equilibrium

Derived forms of irreversible

irreversibility or irreversibleness, nounirreversibly, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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