tact 
/ˈtækt/ noun
/ˈtækt/ noun [noncount] : the ability to do or say things without offending or upsetting other people
▪ The peace talks required great tact on the part of both leaders. ▪ I was surprised by his lack of tact.
▪ The peace talks required great tact on the part of both leaders. ▪ I was surprised by his lack of tact.
