שְׂמִיכָה • (smikha) f (plural indefinite שְׂמִיכוֹת, singular construct שְׂמִיכַת־) [pattern: קְטִילָה]
Perhaps from an unused verb in the root ס־מ־ך (s-m-k), alternatively borrowing from Aramaic מַשְׁכָּא.