Incorrect spelling, explanation: awfull is incorrect because of one simple issue – there is no such suffix as -full. There was one in the past, but over time it changed to be simpler, and currently, we use the suffix -ful. If you ever struggle with remembering that, think of many words such as beautiful, lawful, and so on, so you can also remember, that the proper spelling is awful with just one l.

Correct spelling, explanation: awful is a word created by suffixation. What it means, is that it has a base word – awe – and a suffix -ful. The e from awe is omitted in the base word because in pronunciation it’s silent and therefore unnecessary in the compound. More interestingly, you may suspect that the suffix -ful comes from the word full, and you’d be right. But always remember, that while full of awe would be completely fine, in the suffix -ful there is only one l.

Definition of awful:
adjective
1. very bad, horrible
There was an awful crash on my street; both cars involved had to be scrapped.
2. emphatically “very big“, usually about something negative
We were taking an awful risk by buying out this business; we were lucky it paid off.
adverb
1. emphatically “very“, usually about something negative
We went to a luxurious restaurant, the food was awful expensive, and it wasn’t even that tasty.

Incorrect spelling