The term "irretrievability" refers to the quality or state of being impossible to retrieve. There are some synonyms for this word, including "irreversibility," "incapability," and "unrecoverability." "Irreversibility" denotes the inability to reverse or undo a situation or decision. "Incapability" refers to the lack of ability or capacity to retrieve or recover something that has been lost or damaged. "Unrecoverability" implies the impossibility of bringing back something that has been lost or destroyed. These synonyms are useful for writers who want to avoid repeating the same word multiple times in their writing or those looking to expand their vocabulary and improve their writing skills.