天井【てんじょう】
ceiling, ceiling price, (price) ceiling
井戸【いど】
water well
油井【ゆせい】
oil well
筒井【つつい】
round well
井戸掘り【いどほり】
well digging, well digger
井筒【いづつ】
well curb, well kerb, family crest design based on a square wooden well curb
市井【しせい】
the street, the town
井戸水【いどみず】
well water
井戸端会議【いどばたかいぎ】
content-free chat, idle gossip