常磐

Etymology 1
→ → * →  →

From.

Shift from a compound of.

The sense is ateji for.

Noun

 * 1)  a rock that does not change over time
 * 2)  eternity
 * 3)  an evergreen tree

Adjective

 * 1)  eternal, unchanging
 * 2)  evergreen

Proper noun

 * 1) a place name

Etymology 2
→ →

From the first kanji of the names of the provinces: the of, and the  of.

Proper noun

 * 1)  the provinces of  and