en_tn/1sa/31/04.md

armor bearer

The armor bearer carried the large shield of his commanding officer and other weapons. He protected the commanding officer during a battle.

these uncircumcised

The nominal adjective "uncircumcised" can be translated as an adjective. Not being circumcised is a metonym for being foreigners. Alternate translation: "these men who have not been circumcised" or "these non-Israelite men" (See: rc://en/ta/man/translate/figs-nominaladj and rc://en/ta/man/translate/figs-metonymy)

would not

The ellipsis can be filled in. Alternate translation: "would not do what Saul had told him to do" (See: rc://en/ta/man/translate/figs-ellipsis)

took his own sword and fell on it

"killed himself with his own sword"