en_tn/2sa/15/30.md

barefoot

wearing no shoes or sandals

his head covered

This is a sign of mourning and shame. AT: "his head covered in mourning" (See: rc://en/ta/man/translate/translate-symaction)

Ahithophel

See how you translated this man's name in 2 Samuel 15:11.

conspirators

people who join together against someone else

please turn Ahithophel's advice into foolishness

David is asking Yahweh to make Ahitohphel's advice foolish and useless. AT: "please let whatever advice Ahithophel gives be foolishness and unsuccessful" (See: rc://en/ta/man/translate/figs-explicit)