ἐπεποίθει, [2 verses](verb 3rd sg plup ind act) is from  peitho, which means "persuade", "obey", "prevail upon", "talk over", "mislead," and "tempt (with food), "believed", "trusted", and "relied upon".  - - The  uncommon verb translated as "he trusted" means "persuade", "obey", "prevail upon", "talk over", "mislead," and "tempt (with food), "believed", "trusted", and "relied upon".  The subject is clearly the conquered man.  which means "persuade", "obey", "prevail upon", "talk over", "mislead," and "tempt (with food), "believed", "trusted", and "relied upon".  - - The  uncommon verb translated as "he trusted" means "persuade", "obey", "prevail upon", "talk over", "mislead," and "tempt (with food), "believed", "trusted", and "relied upon".  The subject is clearly the conquered man. 

πέμψαντά [39 verses](part sg aor act masc acc) "Sent" is pempo, which means "send," "send forth," "send away," "conduct," and "escort." -- "Sent" is from a Greek verb that means "send," "send forth," "send away," "conduct," and "escort." This is the second most common word Jesus uses that is translated as "send out," but this one doesn't have the prefix that has the sense of "out."

[2 verses](adj pl masc gen) "Of the four thousand" is tetrakischilioi, meaning "four thousand." -- This Greek word means four thousand.

πεντακόσια, [1 verse](adj pl neut acc) "Five hundred" is from pentakosioi, which means "five hundred".- The word translated as "five hundred" means "five hundred". 

πέντε [12 verses](numeral) "Five" is from pente, the number five."Five" is pente, the number five. -- This is the Greek word for the number five