Which word describes something that cannot be changed?

Which word describes something that cannot be changed?

• A. Immutable
• B. Languor
• C. Effervesce
• D. Filibuster

Answer: (A)

When a word means something cannot be changed, the best fit is immutable. Immutable describes something fixed, unchanging, or not subject to alteration—its state remains the same over time. The prefix im- means not, and mutable means changeable, so immutable literally means not changeable. The other terms don’t convey that sense: languor refers to a state of weariness or inertia, effervesce means to fizz or be lively, and filibuster is a delaying tactic in a political setting. So immutable is the precise term for “cannot be changed.”

When a word means something cannot be changed, the best fit is immutable. Immutable describes something fixed, unchanging, or not subject to alteration—its state remains the same over time. The prefix im- means not, and mutable means changeable, so immutable literally means not changeable. The other terms don’t convey that sense: languor refers to a state of weariness or inertia, effervesce means to fizz or be lively, and filibuster is a delaying tactic in a political setting. So immutable is the precise term for “cannot be changed.”