丸まる天てん井じょう

ま

る

て

ん

じょ

う

Meanings

arched ceiling; vaulted ceiling; domed ceiling; circular ceiling

Refers to a ceiling that is curved or rounded, such as an arch, vault, dome, or circular shape. Used in architectural contexts.

Beautiful paintings are drawn on the arched ceiling of the church.

この部屋へやは丸まる天てん井じょうになっていて、開かい放ほう感かんがある。

This room has a vaulted ceiling, giving a sense of openness.

天てん井じょう
General term for ceiling; 丸天井 specifically refers to a rounded or arched ceiling.
アーチ
Loanword for 'arch'; often used for arch-shaped structures, while 丸天井 is a native compound for arched ceilings.

Compound of 丸 (まる, 'round') + 天井 (てんじょう, 'ceiling'). The alternate spelling 円天井 uses 円 (circle/round).