The one with a question

Is DETERMINATED a word?

I have been wondering this for a couple years now. It's true.

I was at Scouts (did you know I used to be a Bear Leader?) and I gave an award to one of the boys -

"Most Determinated"

and presented it to him at the awards night. I guess the word I was meaning was "Determined."

Everyone laughed.

But isn't it a word? I swear it sounds like one. Has anyone else here been confused all these years?

No googling this either! :) The only allowable answers are from your already attained knowledge. Haha.

I'm a nerd.