unwithheldadj.
Etymology: Previous versions of the OED give the stress as: unwithˈheld.
the mind > possession > relinquishing > [adjective] > not withheld
1727 J. Thomson 146 Ye..Who saw him..All unwithheld, indulging to his friends The vast unborrow'd treasures of his mind.
This entry has not yet been fully updated (first published 1926; most recently modified version published online June 2019).