en_tn/act/17/17.md

he reasoned

"he debated" or "he discussed." This means that there is interaction from the listeners rather than only his preaching. They are talking with him as well.

others who worshiped God

This refers to Gentiles (non-Jews) who give praise to God and follow him but do not obey all of the Jewish laws.

in the marketplace

"in the public square." This is a public place of business, where buying and selling of goods, cattle, or services take place.