屋 (Kanji for store)

Onyomi

You can only leave your corpse at my store until it starts to smell.

( xxx ) や

a store which only sells xxx (本屋= bookstore, パン屋= bread store, etc.) SUF
★★★★☆

部屋(へや)	room ★★★★★ FP 1/2 KANA 部 (section) + 屋 (store) = 部屋 (room)
居酒屋(いざかや)	Japanese-style bar ★★★☆☆ KUNKUN 居 (live) + 酒 (liquor) + 屋 (store) = 居酒屋 (Japanese-style bar)
恥ずかしがり屋(はずかしがりや)	someone who gets embarrassed easily. ★★★☆☆ 恥 (disgrace) + 屋 (store) = 恥ずかしがり屋 (someone who gets embarrassed easily.)
屋根(やね)	roof ★★☆☆☆ KUN ON 屋 (store) + 根 (root) = 屋根 (roof) roof . That's right, not root. Roof!
オバケ屋敷(おばけやしき)	Haunted House! ★☆☆☆☆ オ () + 屋 (store) + 敷 (lay out / site) = オバケ屋敷 (Haunted House!)

	Meaning	Hint	Radical
屋	store	CORPSE
室	room suffix	CROWN

You go to a mortuary store to buy a CORPSE,
but you wear a CROWN in the throne room.