Tactful
Part of speech: adjective
Definition: Possessing tact; Able to deal with people in a sensitive manner.
Diplomatic
Part of speech: adjective
Definition: Concerning the relationships between the governments of countries.Exhibiting diplomacy; exercising tact or courtesy; using discussion to avoid hard feelings, fights or arguments.
Example sentence: History is filled with tragic examples of wars that result from diplomatic impasse. Whether in our local communities or in international relations, the skillful use of our communicative capacities to negotiate and resolve differences is the first evidence of human wisdom.