unfit

Not suitable or good enough for a particular job, use, or activity.

• This water is unfit to drink.
• He was declared unfit for duty.
• The damaged building is unfit for human use.

How to use it: unfit for something (The meat was unfit for consumption.); unfit to do something (The driver was unfit to work that night.)

Similar words: unsuitable, unqualified

Opposites: fit, suitable

Common phrases: unfit for something, unfit to work, unfit for consumption

Not strong or healthy enough for exercise, often because you have not been physically active.

• I feel unfit these days.
• He became unfit after months without exercise.
• She was too unfit to finish the short run.

Similar words: out of shape

Opposites: fit

Common phrases: physically unfit, feel unfit, very unfit