Compound of 鹿 (shishi, “deer”) + 威し (odoshi, “threat”). shishi originally meant "beast" and included other types of animals. The device was originally used to scare away animals.
鹿威し (hiragana ししおどし, rōmaji shishiodoshi)
- a device used to scare away bird and animals
- a traditional device found in Japanese gardens; composed of a bamboo tube that when filled with water revolves to empty and makes a clanking sound