In Ancient Babylonia, soups and stews reigned supreme. Food historians are now using taste-tests to recover their forgotten flavours.
for the lamb stew known as tu'hu, first you get water. Then you sear leg meat in fat. In go salt, beer, onion, rocket, coriander, Persian shallot, cumin, beets, water. Crushed leek and garlic and more coriander, for a fiery taste. Then add kurrat, an Egyptian leek.
You think it's spicy? I've never heard that honestly. A little peppery tasting, sure, but not spicy. Unless there's spicy varieties of it or something.
I thought wasabi was its own unique root veggie type, didn't realize it was a radish relative. Horseradish obviously, but if we're talking the round red radishes you get in the produce section, those aren't spicy. Mildly peppery at best, but I would never refer to them as spicy per se.
A word that is sometimes used is "piquant", rocket is just another kind of mustard essentially and it can be hot like mustard can be (think how wasabi is spicy; the greens are not as spicy as wasabi generally, but it's on the same spectrum).