diplomatic (adj.)
- acute
- adept
- adroit
- ambassadorial
- apt
- arch
- artful
- artistic
- astute
- authoritative
- bland
- brilliant
- cagey
- canny
- civic
- clean
- clever
- consular
- coordinated
- courteous
- crack
- crafty
- cunning
- cute
- daedal
- deceitful
- deep
- deep-laid
- deft
- delicate
- designing
- dexterous
- dextrous
- discerning
- discreet
- excellent
- expert
- fancy
- feline
- foxy
- geopolitical
- good
- goodish
- governmental
- graceful
- guileful
- handy
- ingenious
- insidious
- inventive
- knowing
- magisterial
- masterful
- masterly
- ministerial
- neat
- pawky
- perceptive
- perspicacious
- polite
- politic
- political
- professional
- proficient
- prudent
- quick
- ready
- resourceful
- scheming
- sensitive
- serpentine
- sharp
- shifty
- shrewd
- skillful
- slick
- slippery
- sly
- smooth
- snaky
- sneaky
- some
- sophistical
- statesmanlike
- stealthy
- strategic
- stylish
- subtle
- supple
- tactful
- tactical
- thoughtful
- tricksy
- tricky
- virtuoso
- vulpine
- wary
- well-done
- wily
- wise
- workmanlike