noun
eave; eaves soffit
Refers to the underside of the eaves, especially in architectural or construction contexts. Often used in compound terms like 軒天井 (のきてんじょう).
軒天の塗装が剥がれてきた。
The paint on the eaves soffit is peeling off.
軒天には防火材料が使われている。
Fire-resistant materials are used for the eaves soffit.