unfinishingn.
Etymology: Previous versions of the OED give the stress as: unˈfinishing.
the world > action or operation > completing > non-completion > [noun]
1642 J. Milton 37 Their noble deeds, the unfinishing whereof already surpasses what others before them have left enacted.
This entry has not yet been fully updated (first published 1921; most recently modified version published online March 2020).