1626 F. Bacon §693 The over~moisture of the brain doth thicken the spirits visual.
1766 at Rabbit It is over moisture that always causes this disease; the greens therefore are always to be given dry, and a sufficient quantity of hay, or other dry food, intermixed with them.
2002 baap.lt 25 Oct. (O.E.D. Archive) Some soils suffer from over moisture temporarily while others are constantly over moist.