Rarefied
Part of speech: adjective
Definition: Esoteric. Less dense than usual.
Reserved
Part of speech: verb
Definition: To keep back; to retain.
Part of speech: adjective
Definition: Slow to reveal emotion or opinions.Set aside for the use of a particular person or party.
Example sentence: In Britain, politicians who openly discuss their spirituality are about as welcome as Jehovah' s Witnesses on the doorstep, and the British associate the mixture of politics and religion as a heady cocktail best reserved for the mass irrationality of Northern Ireland, Iran, Kashmir, and the Middle East.