堅苦しい

(1)rigidly formal; "a starchy manner"; "the letter was stiff and formal"; "his prose has a buckram quality"

(2)固く形式張ったさま

(3)(of spoken and written language) adhering to traditional standards of correctness and without casual, contracted, and colloquial forms; "the paper was written in formal English"

(4)（口語や文語について）略式、短縮、口語体を用いず、正確性に対する伝統的な標準に忠実であるさま

(1)