The word translated "surely" shows that the writer has finished describing how evil the "mighty man" [verse 1](./001.md) is and is now describing what God will do and that it will surely happen.
Being alive on earth is spoken of as if people are plants with roots in the ground. God killing someone is spoken of as digging up the plant's roots and taking it out of the ground. Alternate translation: "he will take you out the land of the living" or "He will kill you so that you will no longer be on earth with living people" (See: [[rc://en/ta/man/translate/figs-metaphor]])
This may be a musical term that tells people how to sing or play their instruments here. Some translations write the Hebrew word, and some translations do not include it. (See: [[rc://en/ta/man/translate/translate-transliterate]])