רָכַס to stamp; (denom. of רֶכֶס) to make a ceiling of cement (v. מַעֲזִיבָה). Y’lamd. beg., quot. in Ar. אימתי ר׳ הקב"ה וכ׳ when did God form his upper stories with water as cement, v. רֶכֶס.—[b. h. רכס to fasten.]
Pi. - רִכֵּס to stamp; esp. (of beasts) to pass over wetted grain; to husk (differ. fr. דּוּשׁ). B. Mets. 89ᵇ, sq. פרות המְרַכְּסוֹת בתבואה והדשות וכ׳ when cows stamp (secular) grain, or thresh corn of T’rumah &c.
Hif. - הִרְכִּיס to cause to stamp, let (beasts) stamp. Tosef. ib. VIII, 10 המַרְכִּיס ed. Zuck. (Var. המְרַכֵּס Pi.); Y. Ter. IX, beg. 46ᶜ המרכין (corr. acc.).