The antonyms of *adaptations* are *rigidity* and *inflexibility*. *Rigidity* refers to the physical quality of being stiff or inflexible, while *inflexibility* refers to the mental quality of being unwilling or unable to change. Use these words to enhance vocabulary, improve writing, and enrich discussions by expressing opinions on the importance of flexibility and adaptability.

그의 신념에 대한 그의 *엄격함*은 그가 새로운 아이디어를 받아들이는 것을 어렵게 만들었습니다.

彼の信念における彼の*硬直性*は、彼が新しいアイデアを受け入れることを困難にしました。

His *rigidity* in his beliefs made it hard for him to accept new ideas.

그녀의 업무 일정에 대한 그녀의 *경직성*은 그녀가 중요한 회의에 참석하는 것을 어렵게 만들었습니다.

彼女の仕事のスケジュールにおける彼女の*柔軟性の欠如*は、彼女が重要な会議に出席することを困難にしました。

Her *inflexibility* in her work schedule made it difficult for her to attend important meetings.