EXAMPLES FROM THE WEB FOR ADUMBRATE
There had, in truth, scarcely yet been time enough to adumbrate the possibilities opened up by this gentleman's return.
But it is now time to state, or rather faintly to adumbrate, the grand assumption of this singular work.
Feeble is human speech to deal with such high matters, serving, at the best, but dimly to adumbrate ineffable truths.
One could adumbrate triumph or disaster by the effort, sustained or otherwise, made by them.
A type is a symbol appointed by God to adumbrate something higher in the future, which is called the antitype.