朕
チン

majestic plural, imperial we

JLPT1 G7 S10 F5000

The relevant oracle bone form of this character is 舟 boat (→ rounded object) + an element# combining 廾 pair of hands and a mark → hands stretched about a rounded object to raise it high → *royal we* (← elevate oneself in speaking). In derivative characters, 朕 may appear in the form seen for example in 滕.

[Full Kanji Etymology List]