the mind > mental capacity > memory > effacement, obliteration > efface, obliterate [verb (transitive)] > by burying or submerging (4)
To bury in gravel or sand; to overwhelm with gravel; hence figurative to suppress, stifle. Obsolete.
transferred and figurative. To enclose as in a tomb; to overwhelm; to bury. Also absol.
figurative. To ‘drown’, ‘submerge’. Obsolete.
With under: To bury in snow; figurative to submerge, overwhelm, overpower, etc. Originally U.S.