unforgoable
adjEtymology From un- + forgoable.
1
That cannot be forgone.
- We simply worked, calm in the entire I believe, knowing the unforgoable necessity for the orderly, for concord, for the exclusion of the extraneous, links as we were in a fastidious procedure, impervious to interruption, into which we, the ship and her company, were now inescapably locked [...]2013, William Brinkley, The Last Ship: A Novel, →ISBN, page 145: