en_tn/act/15/32.md

also prophets

Prophets were teachers authorized by God to speak for him. Alternate translation: "because they were prophets" or "who were also prophets"

the brothers

"the fellow believers"

strengthened them

Judas and Silas' helping them to depend even more on Jesus is spoken of as if they were making them physically stronger. (See: rc://en/ta/man/jit/figs-metaphor)