Resembling an onion or onions, especially in terms of smell.(adjective)
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Use "oniony" in a sentence
"A footlong is the 12-inch hot dog (preferably with that thin oniony chili) that I get at Dairy Queen (and have eaten there since I was five)."
"I also had a glass of really lovely, properly hot russian tea, served with several kinds of pretty sugar cubes and lemon slices, as well as a complimentary loaf of some kind of oniony black bread, the remainder of which, I took away with me."
"This was tasty, if a tad too "oniony" and next time I may use more herbs and less onion."