殿 means “palace, hall, lord”

でん · den

Also: Mr., mansion

Kun'yomi (Japanese reading)
との
On'yomi (Chinese reading)
デン, テン

JLPT N2 · Taught in secondary school · 13 strokes

The story

A figure (尸) seated in state, people gathered (共) below and a guard with a staff (殳) at the door: a lord's hall. 宮殿 is a palace, a shrine's 本殿 its main hall, 殿様 the lord of samurai dramas, and 殿, read どの, still follows names on official papers.

Used in 宮殿 (kyuuden, palace), 本殿 (honden, main hall of a shrine), and 殿様 (tonosama, feudal lord)

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Readings from KANJIDIC2, © EDRDG, CC BY-SA.