Some examples of word usage: dullness
1. The dullness of the lecture made it difficult to stay awake. (講義の退屈さは、目を覚ましているのが難しかった。)
2. She found the dullness of the movie to be unbearable. (彼女は映画のつまらなさが我慢できないと感じた。)
3. The dullness of the weather made her feel gloomy. (天気のつまらなさが彼女を暗い気持ちにさせた。)
4. He was surprised by the dullness of the color after it dried. (乾いた後の色のつまらなさに彼は驚いた。)
5. The dullness of the room's decor was disappointing. (部屋の装飾のつまらなさはがっかりだった。)
6. The dullness of the routine made him long for excitement. (日常のつまらなさが、彼を刺激を求める気持ちにさせた。)