全

Originally a compound ideograph:

玉 (jade) symbolized purity and preciousness;

入 (enter) over it suggested covering, enclosing, or preserving something valuable.

In early usage, 全 referred to pure, unblemished jade. Over time, the meaning broadened to “intact,” “whole,” and then “entire.”

全國 (전국) – nationwide;

安全 (안전) – safety, security;

全力 (전력) – all one’s strength.

Note that in Japan, Mainland China and Vietnam, the top of the character is 人, while in Hong Kong, Taiwan and Korea, the top is 入, which is the historical form found in the Kangxi Dictionary.