(S, A, Msb) and ↓اغتمس (S, A) He, or it, became immersed, immerged, dipped, plunged, or sunk, in water: or he immersed or immerged himself, plunged, or dived, in water: (S, A, Msb:) or he did so remaining long therein. (TA in this article and in article رمس.) [See ارتمس.]
2.
[Hence,] ↓ the latter also signifies, [and so apparently the former,] (assumed tropical:) He hid, or concealed, himself. (T, O.)