Is further a verb is the sentence An opportunity to further relations in the community?

(The adverb further means "to a greater extent" or additional - for a distance, use "farther") "John was further in debt than his wife knew." "The product needs further testing to improve its...

no

I don't like that outfit on you, furthermore, it's too small for you.

Further is used when referring to degree of change where farther is referring to distance. I can throw a ball farther than you or further my pitching skills with practice.

Go further! The ball is really light.