noun
summer sun; summer
Literary or poetic word for the blazing summer sun or the summer season itself. Not used in everyday conversation; found in poetry, lyrics, or elevated prose.
炎陽の下で、蝉の声が響いていた。
Under the summer sun, the cicadas' cries echoed.
炎陽の候、皆様にはますますご清栄のこととお喜び申し上げます。
In this season of summer sun, I hope you are all doing well.
Compound of 炎 (flame, blazing) and 陽 (sun, sunlight). The exact historical derivation is uncertain; the spelling is conventionally associated with the meaning of intense summer sun.