Correct spelling, explanation: grateful is an adjective and it consists of two parts: grate and -ful. The first one is the root and the second one is the suffix. It comes from obsolete grate, meaning pleasing, thankful (from Latin gratus). You can’t change the spelling to greateful because it wouldn’t make any sense. Always look at the word’s etymology before writing it down. Grateful is the only correct version.

Incorrect spelling, explanation: when deriving a word, one must always look at its root. In this case, it’s grate. We can’t change the spelling of the basis, so greateful is incorrect. Grateful is an adjective made of two elements: grate + -ful. The suffix -ful is used after some roots to form adjectives from nouns, with the meaning full of; having the qualities of. The only correct spelling of this word is grateful.

Definition of grateful:
adjective, warmly or deeply appreciative of kindness or benefits received
I would be grateful to hear from anyone who may be able to help.
He’s very grateful you rescued his grandson.

Collocations with grateful:
Some most commonly used collocations include: extremely grateful, and more than grateful.
We will be extremely grateful to people of great heart for all the support they have shown us.
Just having survived, I am more than grateful.

Incorrect spelling

Incorrect spelling

Incorrect spelling

Incorrect spelling