ריִ"ש, Resh, name of the twentieth letter of the alphabet. Sabb. 104ᵃ, v. קו"ף; a. fr.—Pl. רֵישִׁין. Ib. 103ᵇ דלתין ר׳ ר׳ דלתין one must not write Daleths so as to look like Reshes, or Reshes so as to look like Daleths.—[ריש לקיש, v. לָקִישׁ I.]