1) Considerately 2) Delicately 3) Discreetly 4) In a diplomatic manner 5) Sensitively 6) Tactful friend in a fray 7) Thoughtfully 8) With diplomacy 1) Judiciously 2) Tactfully 
• (adv.) According to the rules of diplomacy; in the manner of a diplomatist; artfully.
Dip`lo·mat'ic·al·ly adverb According to the rules of diplomacy; in the manner of a diplomatist; artfully. 
[adv] - in a diplomatic manner
with diplomacy adverb in a diplomatic manner; `he answered very diplomatically`