井の中の蛙大海を知らず[inonakanokawazutaikaiwoshirazu] parochial
井桁[igeta] well lining
井戸[ido] water well
井戸屋形[idoyakata] well roof
井戸掘り[idohori] well digging

井戸綱[idozuna] well rope
井戸車[idoguruma] well pulley
井戸水[idomizu] well water
井戸側[idogawa] well curb
井戸替え[idogae] well cleaning

辣油[raayu] Chinese red chile oil (chile, chilli)
あまに油[amaniyu] linseed oil
荏胡麻油[egomayu] egoma seed oil
英国石油[eikokusekiyu] British Petroleum
乾性油[kanseiyu] drying oil

肝油[kanyu] fish-liver oil (cod, shark, etc.)
含油層[ganyusou] oil strata
揮発油[kihatsuyu] gasoline
給油[kyuuyu] supply of oil
桐油[touyu] tung oil