旬

Glyph origin
.

The pictographic protoform of was borrowed to represent "period of days" in oracle bone script. In bronze inscriptions, the semantic component was added to this character. In the Warring States period, the phonetic component was mistaken as, hence the incorrect analysis in  of this character as.

Definitions

 * 1) ten-day period
 * 2) ten years
 * 3) period of time
 * 1) period of time

Kanji

 * 1) period of ten days

Etymology 1
.

Noun

 * 1) season

Etymology
From.

Han character

 * 1) week