noun
sad occasion; funeral
Refers to a mournful event, especially a funeral. Often used in contrast with 祝儀 (しゅうぎ, 'happy occasion').
不祝儀の席では、派手な服装は避けるべきだ。
At a funeral, you should avoid flashy clothing.
祝儀と不祝儀の両方に使えるのし袋がある。
There are noshi envelopes that can be used for both happy and sad occasions.
葬式 is the common word for 'funeral'. 不祝儀 is a more formal or euphemistic term for a sad event, often used in the context of monetary gifts or etiquette.
Compound of 不 (ぶ, 'not') and 祝儀 (しゅうぎ, 'celebration'), literally meaning 'non-celebration'.