Jastrow: הֶיקֵּשׁ

הֶיקֵּשׁ, הֶיקֵּישׁ, הֶקֵּישׁ, הֶקֵּשׁ m. (נָקַשׁ) [clapping together,] comparing, correspondence; esp. hekkesh, the analogy between two laws which rests on a biblical intimation (as Lev. XIV, 13) or on a principle common to both. Y. Pes. VI, beg., 33ᵃ מה׳ הואיל ותמיד וכ׳ he derived the law that the Passover sacrifice supersedes the Sabbath (v. דָּחָה) by drawing an analogy: as the daily offering is &c., (contrad. to גזירה שוה, v. גְּזֵרָה). Zeb. 49ᵇ, a. e. דבר הלמד בה׳ חוזר וכ׳ a law which is derived by analogy may be used for deriving another law by analogy; a. fr.