The word(s) "roots" appears 3 time(s) in 3 verse(s) in Quran in Mohsin Khan translation.

(1) So We saved him and those who were with him by a mercy from Us, and We cut the roots of those who belied Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.); and they were not believers.

(2) And (remember) when Allah promised you (Muslims) one of the two parties (of the enemy i.e. either the army or the caravan) that it should be yours; you wished that the one not armed (the caravan) should be yours, but Allah willed to justify the truth by His Words and to cut off the roots of the disbelievers (i.e. in the battle of Badr).

(3) Verily, this (the Qur'an) is the Word that separates (the truth from falsehood, and commands strict laws for mankind to cut the roots of evil).