Comparative form of grainy: more grainy(adjective)
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Use "grainier" in a sentence
"The dressing was a grainier, stronger tasting dressing."
"Its photos were sourced from the Internet; some are grainier than others."
"The dried chickpeas definitely have a nuttier flavour although, having helped myself to a few, I reject the idea that the others are actively unpleasant, but they also give the hummus a grainier texture."