外交辞令

がいこうじれい

Common word

noun, no-adjective

•

diplomatic turn of phrase, diplomatic language, tactful way of expressing something(yojijukugo)

外	outside
交	mingle, mixing, association, coming & going
辞	resign, word, term, expression
令	orders, laws, command, decree, good

がいこうじれい

Those words are mere diplomatic niceties