中伏

zhōng
the second of the three annual periods of hot weather (三伏 sān), which begins in late July and lasts either 10 or 20 days, depending on the Chinese calendar in that year

CEDICT

the middle fu (from late-July to early-August, among the three fus (三伏 (sānfú)), the hottest periods of summer)

Wiktionary

三伏第二夏至第四

重編國語辭典

Homographs

Entry Composition