Ceiling
noun
The heaven well is the well that goes up into the heavens. This is above you, and it is a ceiling. Maybe the "well" part is referring to the chimney that goes up through the ceiling to the heavens when you look up in a super old house?
This is a jukugo word that uses the on'yomi readings of the kanji. You didn't learn that reading for 井, so we've got a mnemonic to help you out with that. Just note that the on'yomi for 井 isn't actually じょう, but rather しょう, it just ends up getting rendaku'd here!
Fixing up ceilings is a tricky task, but you've got just the man for it: Joe (じょう). Your local farmhand that does it all, nothing is too tricky or out of reach for him, you're starting to think that this man can do just about anything. What a handy person to have around.
天井にいる
to be on the ceiling
天井にある
to be on the ceiling
天井に取り付ける
to affix to the ceiling, to install on the ceiling
天井につるす
to hang from the ceiling
部屋の天井
ceiling of a room
家の天井
ceiling of a house
ガラスの天井
glass ceiling
相場の天井
the ceiling for the stock market, the ceiling for a market
天井にクモがいる！
There is a spider on the ceiling!
このプランター、天井からつるしたいんだ。
I want to hang this planter from the ceiling.
どうやらあの日が相場の天井だったようだね。
It seems like that day was the ceiling for the stock market.