Correct spelling, explanation: this form is correct because the adjective sudden and adverb suffix -ly gives the word suddenly. There is no need to add any extra letters, so suddendly is a misspelling and the only correct form is suddenly.
Definition of suddenly:
adverb, quickly, usually unexpectedly
Suddenly, the loud sound woke everybody up.
I was walking down the street and suddenly I realised I had forgotten my phone.
Incorrect spelling, explanation: suddendly is incorrect because there is no reason to add d between root adjective sudden and adverbial suffix -ly. Therefore the correct form is suddenly. Sudden + -ly is suddenly.
Incorrect spelling
✔ Click to open Free Grammar, Style and Spell Checker
Still not sure?
Ask your question in our comments section below (we reply to all comments within 24 hours)or return to main search.
Hi there! We just would like to give an enormous thumbs up for the nice dictionary you’ve gotten right here on that web site. I will be coming again to this site for more soon.
That looks good.