Wasabi
Japanese Horseradish
noun
If you dig up hollyhocks in the mountains, and grind up their roots, you'll have wasabi! Don't eat too much, or you'll burn your tongue off.
わさび
This reading is an exception, but I'm sure (at least I hope) that you've heard the word wasabi before. It's the same in Japanese so just remember the meaning and you'll know the reading too!
やはり、すりたての山葵は美味しいね。
Of course, freshly shaven wasabi is delicious.