| Date: | 1500-1600 |
| Origin: | grate 'pleasing, thankful' (16-17 centuries), from Latin gratus |
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grate‧ful W3

1 feeling that you want to thank someone because of something kind that they have done, or showing this feeling [≠ ungrateful]
She gave me a grateful look.
extremely/deeply/eternally etc grateful
I am extremely grateful for the assistance your staff have provided.
I am extremely grateful for the assistance your staff have provided.
She gave me a grateful look.2 used to make a request :
I would be most grateful if you could send me an invoice in due course.
I would be grateful if you could/would ...
formal
I would be most grateful if you could send me an invoice in due course. —gratefully adverb:
The authors gratefully acknowledge your financial support.
The authors gratefully acknowledge your financial support.