dohyo means the ring, made of compacted clay, in which a sumo wrestling match is held. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
noun
- The ring, made of compacted clay, in which a sumo wrestling match is held.“Sumo ’bots also tend to have very low ground clearance since they operate on dohyos, which have a very smooth rubberized running surface; […]”