the quality of being delicate (all senses)

daintiness, fineness of structure

the (skill of) management of a country's affairs by ambassadors and ministers living overseas

tact

a delicate way of dealing with a situation

know-how, maneuver

the power to learn, understand and know; information, especially with reference to important events

ability to perceive, understand

Intelligence Quotient (a measure for comparing intelligence)

ability to perceive, understand

something of which the cause or origin is impossible to explain or understand

puzzle, secret

a very small difference or distinction

fine point

a small difference in meaning, opinion, colour etc

slight difference; shading

an attempt to avoid an honest answer by using a secondary or doubtful meaning of a word or phrase; to argue about small points or differences

objection, complaint

the art of planning an activity, e.g. a war

plan of action

(the use of) skill and understanding shown by a person who handles people and situations successfully and without causing offence

finesse, thoughtfulness