Supposedly vs. Supposably

Have you encountered these before? Which one do you think is correct? Well, I'm here to tell you all there is about them.

"Supposedly" vs. "Supposably" in English

What Is Their Main Difference?

Both are adverbs. However, we use 'supposably' when something can happen. In other words, it shows possibility, while, 'supposedly' indicates thinking something is true, although one is doubtful.


We use 'supposably' when something is possible to be true, while, 'supposedly' is used when we are not sure whether something is true or not. Look at the examples below:

Dragons may supposably be alive.

Well, she has supposedly been sick this time.


Both are adverbs. Check out the examples below:

She and I can supposably date.

Supposedly, the Johnsons have moved away.

Are They Interchangeable?

Since they have different meanings, they cannot be used interchangeably. 'Supposably' shows possibility, while, 'supposedly' is about doubting something to be true. Compare:

✓ Many fish will supposably be extinct in the near future.

X Many fish will supposedly be extinct in the near future.

This sentence has a different meaning.


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