چله

أَرْبَعِينِيَّة

1. a period of time (especially one of forty days)
2. fortieth (day of something)
3. peak, climax
4. midwinter
5. midsummer
6. in Tajikistan, the 40 days after the winter or summer solstice, considered as, respectively, the coldest and hottest period of times of each year

الجمع: چلهها