Not so easy vs Tough

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

Not so easy

Top 3,000 (common)

Tough

Top 1,000 (very common)B2adjective
Most common: Tough
 Not so easyTough
Pronunciation🇬🇧 //nɒt səʊ ˈiːzi//🇺🇸 //nɑt soʊ ˈizi//🇬🇧 /["/tʌf/"]/🇺🇸 /["/tʌf/"]/
MeaningSomething that is not simple or straightforward.Hard or difficult to deal with
ExampleCompleting this project on time is **not so easy**.The competition was tough, but I managed to win first place.
RegisterNeutralNeutral
How commonTop 3,000 (common)Top 1,000 (very common)
CEFR level-B2
Part of speechadjective
Collocationsnot so easy task, not so easy to understand, not so easy as it seems, not so easy decisionbe, seem, get, extremely, fairly, very, on, be, become, get, extremely, fairly, very, on, with, appear, be, feel, extremely, fairly, very, appear, be, feel, extremely, fairly, very
Antonyms-easy, soft, gentle
Common mistakesUse 'not so easy' in formal writing where it's too informal., Confuse with 'not easy' - 'not so easy' implies a comparison., Overuse in contexts where simpler phrases would suffice.Using 'tough' as a noun — 'He is a tough' should be 'He is tough'., Confusing 'tough' with 'though' in casual speech., Overusing 'tough' in contexts where 'difficult' is more suitable.
Usage notesUsed to express that a task or situation is more difficult than it appears. Often used informally in conversation.Use 'tough' to describe something that is difficult, whether it's a situation or a person’s character. It's appropriate in both casual and formal contexts but may sound too informal in very serious discussions.

See it in real clips

Not so easy
Tough

Frequently asked questions: Not so easy vs Tough

What's the difference between Not so easy and Tough?

Not so easy: Something that is not simple or straightforward. Tough: Hard or difficult to deal with

Which is more common: Not so easy and Tough?

Tough is the most common in everyday English.

Can you show an example of each?

Not so easy: Completing this project on time is **not so easy**. Tough: The competition was tough, but I managed to win first place.

Can I use Not so easy and Tough interchangeably?

Not always. Not so easy and Tough 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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