Pictograph of a container for storing things. Original form of 貯. In simplified Chinese 宁 is also used to mean "peaceful", while in traditional Chinese this meaning is written with a separate character 寧.
Character Evolution
Oracle Bone~1250-1000 BCOracle Bone~1250-1000 BCBronzeLate Shang~1100 BCBronzeEarly Western Zhou~1000 BCBronzeEarly Western Zhou~1000 BCSealShuowen~100 ADRegularModern