καιρός

Etymology
Of origin. Possibly related to (as a "decisive moment"),  (as an "atmospherical mix"), or ; Beekes seems to favor the connection to  the most. Might also be related to, or the source of, 🇨🇬 (an archaic term).

Noun

 * 1) measure; proportion; fitness
 * 2) (of time): period (of time); season; time
 * 3)  proper time, opportunity; prime, the right moment, the fatal spot
 * 4) (loosely): God's time
 * 5)  the times
 * 6) advantage, profit

Usage notes
Not found in Homer, though it is used by other early authors who wrote in Epic Greek: Hesiod and Theognis.

Etymology
Inherited from. The modern sense, since mediaeval times.

Noun

 * 1) weather
 * 2) time, events
 * 1) time, events