ارتمس فِى المَاءِ

i. q. اِنْغَمَسَ (Mgh, Msb) or اِغْتَمَسَ (K) [He immersed himself in the water]; or so that his head and whole person became concealed therein; the doing of which by one fasting is forbidden in a tradition: (Sh, Sgh;) or not remaining long in the water; (Mgh, TA;) whereas انغمس and اغتمس denote [the doing so and] remaining long in the water; and agreeably with this explanation of the difference, the two verbs are used in another tradition, where it is said, الصَّايءِمُ يَرْتَمِسُ وَلَا يَنْغَمِسُ The faster may immerse himself not remaining long in the water, but not immerse himself and remain long therein. (TA.)