tactful

/ˈtæktfəl/
adjective
  1. Careful not to say or do things that might upset or offend other people; showing skill in handling difficult situations.
    • The manager was tactful in telling the employee about the mistake without making him feel embarrassed.
    • She gave a tactful answer when her friend asked for an opinion on the new haircut.
    • It's important to be tactful when discussing sensitive topics like politics at family gatherings.