From a derivative of cheo (to pour; akin to the base of chasma through the idea of a channel), meaning a storm (as pouring rain); by implication, the rainy season, i.e. Winter -- tempest, foul weather, winter.

χειμών (cheimōn) − 2 Occurrences

χειμῶνος (cheimōnos) − 4 Occurrences