שְׁרַק II = שְׁרַג, to glide, slide. Nidd. 3ᵇ מיא שָׁרְקֵי וכ׳ water (when poured out of an inclined vessel) slides, but fruits do not slide (and you must invert the vessel in order to empty it). Ḥull. 111ᵃ דמא מִשְׁרַק שָׁרֵיק (Ms. R. 2, a. Ar. משרג שריג, v. Rabb. D. S. a. l. note 60) blood glides off, v. סְרַךְ II.
Pa. - שָׁרֵיק to cause to slip, make slippery. B. Kam. 30ᵇ top תבנו … דמְשָׁרְקֵי the Mishnah speaks of straw and stubble (deposited in the public road), because they make the ground slippery.
Ithpa. - אִשְׁתָּרֵק,
Ithpe. - אִשְׁתְּרִיק, אִישְּׁרִיק to slip, glide. Zeb. 62ᵃ דלא נִשְׁתָּרְקוּ (Rashi to Ex. XXVII, 5 יִשְׁתָּרְגוּ) that the priests might not slip. Ḥull. 52ᵃ כל מידי דמִישְּׁרִיק וכ׳ (some ed. דמִשְּׁ׳, Rashi דמִשְׁתְּרִיק; Ms. H. דמשתריג … לא סריג וכ׳, v. Rabb. D. S. a. l. note 90) in the case of an animal falling on things which slide (e.g. a pile of peas &c.), no internal injury is to be apprehended, but if it falls on things which do not slide &c.