Hard vs Stiff

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

Hard

Top 1,000 (very common)A1adjective

Stiff

Top 2,000 (common)B2adjective
Most common: Hard
 HardStiff
Pronunciation🇬🇧 /["/hɑːd/"]/🇺🇸 /["/hɑːrd/"]/🇬🇧 /["/stɪf/"]/🇺🇸 /["/stɪf/"]/
MeaningNot easy; needing a lot of effort.Not able to move easily; hard.
ExampleThe exam was very hard, and I struggled to answer all the questions.The chair was so stiff that I couldn't sit comfortably on it.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 2,000 (common)
CEFR levelA1B2
Part of speechadjectiveadjective
Collocationsbe, look, seem, extremely, fairly, very, be, look, seem, extremely, fairly, very, be, feel, look, extremely, fairly, very, rock hardbe, feel, lie, extremely, fairly, very, with, (as) stiff as a board, be, feel, get, extremely, fairly, very, from, be, seem, extremely, fairly, very, be, look, seem, extremely, fairly, very, be, seem, extremely, fairly, very
Antonymseasy, soft, gentleflexible, limber, soft
Common mistakes'Hard' often confused with 'hardly', which means 'barely'., Using 'hard' where 'hardy' (meaning strong) is intended., Misplacing 'hard' in phrasal verbs, e.g., saying 'hard to give up' instead of 'hard to let go'.Confused with 'stave' as in to prevent something., Using 'stiff' to describe something that is simply cold without context., Misunderstanding 'stiff' as only referring to physical rigidity.
Usage notesUsed to describe tasks or situations that require great effort or are difficult to understand. It can be used in both formal and informal settings, but may sound more informal in phrases like 'hard as nails'.Used to describe something that is rigid or difficult to bend; also can describe a person who is not relaxed in behavior. Avoid in very casual conversations when referring to people.

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Hard

Frequently asked questions: Hard vs Stiff

What's the difference between Hard and Stiff?

Hard: Not easy; needing a lot of effort. Stiff: Not able to move easily; hard.

Which is more common: Hard and Stiff?

Hard is the most common in everyday English.

Which is more advanced: Hard and Stiff?

Stiff is the highest level, at B2, on the CEFR scale.

Are Hard and Stiff the same CEFR level?

Hard: A1, Stiff: B2 on the CEFR scale.

What part of speech are Hard and Stiff?

Hard: adjective, Stiff: adjective.

Can you show an example of each?

Hard: The exam was very hard, and I struggled to answer all the questions. Stiff: The chair was so stiff that I couldn't sit comfortably on it.

Can I use Hard and Stiff interchangeably?

Not always. Hard and Stiff 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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