jìn​jiǔ

to enter the coldest days of winter

Senses

进九/ 進九 jìn​jiǔ to enter the coldest days of winter

to start the nine periods of nine days following the winter solstice, marking the coldest time of the year

References

same_as 交九/交九 进九/進九
same_as 数九/數九 进九/進九