שְׂרֻפָ֣ה בָאֵ֣שׁ כְּסוּחָ֑ה מִגַּעֲרַ֖ת פָּנֶ֣יךָ יֹאבֵֽדוּ׃
Он сожжен огнем, он вырублен; Они погибают от упрека Твоего лица.
Rashi
לא תזמר — The word is a denominative verb from זמורה, a branch, and denotes: to do something to the branches: it is used here because one lops off its (the vineyard’s) branches. Its translation in the Targum is thus: לא תכסח, “thou shall not cut off”, and this root has a similar meaning in the Hebrew (Isaiah 33:12) “as thorns cut off (כסוחים)”; (Psalms 80:17) “it is burnt with fire, it is cut down (כסוחה).
Ibn Ezra
כסוחה Cast away;36A. V., Torn. the כ is radical; comp. כסוחה thrown down37A. V., Cut down. (Ps. 80:17). These two words are various forms of the same root.38כַּסּוּחָה is an adjective, כְּסוּחָה is participle passive Kal.