Feeble vs Sick

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

Feeble

Top 2,000 (common)B1adjective

Sick

Top 1,000 (very common)A1adjective
Most common: Sick
 FeebleSick
Pronunciation🇬🇧 //ˈfiːbəl//🇺🇸 //ˈfiːbəl//🇬🇧 /["/sɪk/"]/🇺🇸 /["/sɪk/"]/
MeaningVery weak or not strongFeeling unwell or ill.
ExampleThe feeble branches swayed in the light breeze.I feel sick after eating too much candy.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)
CEFR levelB1A1
Part of speechadjectiveadjective
Collocationsfeeble attempt, feeble excuse, feeble health, feeble lightbe, look, become, chronically, desperately, extremely, from, with, be off sick, be, feel, look, horribly, very, violently, with, be as sick as a dog, sick to your stomach, be, become, get, heartily, really, absolutely, of, sick and tired of something, sick to the back teeth of something, sick to death of something, be, seem, sound, extremely, fairly, very, sick in the head, be, seem, sound, extremely, fairly, very, sick in the head
Antonymsstrong, powerful, robust, sturdyhealthy, well
Common mistakesConfused with 'weak' but 'feeble' implies even less strength., Used to describe objects instead of people or actions., Mistaken to mean 'faint' or 'dim', which have different contexts.Confused with 'sick' vs 'ill' — 'ill' is more formal., Using 'sick' to mean healthy — common in slang., Misplacing 'sick' in a sentence.
Usage notesUse 'feeble' to describe physical weakness or lack of strength, often in a negative context. It's not used for strong, positive descriptions.Used to express physical illness or emotional disgust. In slang contexts, it can describe something awesome. Avoid misuse in formal writing.

Frequently asked questions: Feeble vs Sick

What's the difference between Feeble and Sick?

Feeble: Very weak or not strong Sick: Feeling unwell or ill.

Which is more common: Feeble and Sick?

Sick is the most common in everyday English.

Are Feeble and Sick the same CEFR level?

Feeble: B1, Sick: A1 on the CEFR scale.

Can I use Feeble and Sick interchangeably?

Not always. Feeble and Sick 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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