平板

(1)tediously repetitious or lacking in variety; "a humdrum existence; all work and no play"; "nothing is so monotonous as the sea"

(2)退屈に繰り返し、多様性に欠ける

(3)sounded or spoken in a tone unvarying in pitch; "the owl's faint monotonous hooting"

(4)ピッチが変わらないトーンで鳴らされるか、話される

(5)lacking contrast or shading between tones

(6)色調間の対比または陰影が欠けているさま