宮

1. noun shrine
2. palace; imperial residence
3. honorific Imperial prince; Imperial princess
4. headboard with built-in shelves, drawers, etc.
5. archaic temple

きゅう

1. noun palace
2. tonic (of the Japanese and Chinese pentatonic scale)
3. abbreviation ancient Chinese punishment (castration for men, or confinement for women)
4. noun, suffix zodiacal sign