Frail vs Slight

When to use each in English, with meaning, register, and examples.

Frail

Top 3,000 (common)

Slight

Top 2,000 (common)B2adjective
Most common: Slight
 FrailSlight
Pronunciation🇬🇧 //freɪl//🇺🇸 //freɪl//🇬🇧 /["/slaɪt/"]/🇺🇸 /["/slaɪt/"]/
MeaningWeak or thin, easily damaged.A little bit or small in amount.
ExampleThe frail man struggled to carry the heavy box.There was a slight delay in the train schedule due to maintenance work.
RegisterNeutralNeutral
How commonTop 3,000 (common)Top 2,000 (common)
CEFR level-B2
Part of speechadjective
Collocationsfrail health, frail body, frail figureappear, be, seem, extremely, fairly, very, the slightest of…, be, look, very, physically
Antonymsstrong, robust, sturdysignificant, substantial, considerable
Common mistakesConfused with 'fragile' - both mean weak but in different contexts., Using 'frailed' as a past tense; correct form is 'frail'.Confusing with 'slighted' which means to insult someone., Using 'slight' to describe something very large instead of small., Mixing up 'slight' with 'light' regarding weight.
Usage notesUsed to describe physical weakness or delicacy. Avoid when referring to strong, healthy subjects.Use 'slight' to describe something that is not much or only a little. It is appropriate in both formal and informal contexts but is less common in very casual speech.

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Frail
Slight

Frequently asked questions: Frail vs Slight

What's the difference between Frail and Slight?

Frail: Weak or thin, easily damaged. Slight: A little bit or small in amount.

Which is more common: Frail and Slight?

Slight is the most common in everyday English.

Can you show an example of each?

Frail: The frail man struggled to carry the heavy box. Slight: There was a slight delay in the train schedule due to maintenance work.

Can I use Frail and Slight interchangeably?

Not always. Frail and Slight are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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