adj .
unchangeable 불변의

• Jerry's mother had only one _____ rule : no dancing on the dinner table.
• The statue of the former principal looked down on the students with an _____ scowl.
  전임 교장의 동상은 변함없이 찌푸린 얼굴로 학생들을 굽어보고 있었다.
• Something that is changeable is said to be mutable. The mutable shoreline shifted continually as the tides moved sand first in one direction and then in another.
• Helena's moods were mutable ; one minute she was kind and gentle, the next minute she was screaming with anger.
• Both _____ and mutable are based on latin root meaning change. So are mutation and mutant.