demerse
To immerse, to submerge (something).
figuratively, obsolete, transitive
The peach, vvhich hitherto vvas demerſed, now mounted up to the upper part of the liquor in the ſecond receiver; all the reſt ſtaid in the bottom.
Where it comes from
From Latin dēmersus, past participle of dēmergere. See merge.
Adapted from the Wiktionary entry demerse (CC BY-SA 4.0).