unstumbledadj.
Etymology: Previous versions of the OED give the stress as: unˈstumbled.
society > morality > virtue > purity > [adjective] > not morally fallen
1399 W. Langland ii. 82 Ho so had kunnynge and conscience bothe, To stonde vnstombled and stronge in his wittis.
This entry has not yet been fully updated (first published 1926; most recently modified version published online June 2019).