Onions make me literally vomit and Horseradish/cabbage/Kraut/Broccoli is nearly at that level. I can’t smell it/them without gagging physically.
The only other food in that category is Cilantro. It doesn’t make me physically react like the others but I really, really don’t like it.
That’s the way cucumbers affect me. Happily, cukes are the only food allergy I have. ......but it does bother when people sneak chopped up cukes in a salad....and I don’t see them until it is too late.