The decoration style of this meeting room feels very sterile, lacking creativity.

sterile 是由词根 steril-（意为"不育的、无菌的"）加上形容词后缀 -e 构成。本义指"无菌的、消过毒的"，引申为"缺乏生气的、单调乏味的"，形容事物缺乏活力和创意。