Bright, as though with sunshine; shining.(adjective)
Cheerful, happy.(adjective)
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Use "sunshiny" in a sentence
"She said it looked kind of sunshiny, even on a dark day."
"I was growing up in the rural South in those days, in total intuitive sympathy with the sunshiny side of the counterculture."
"In an effort to stick with the warm and sunshiny theme of the weather, I thought I'd pop in and give you a little update on the goings-on in my world lately."