zenith
UK: ˈzɛnɪθ | US: ˈziːnɪθ
n. the highest point reached by a celestial or other object in the sky
n. the peak or climax of something (e.g., power, success)
The word "zenith" originates from the Arabic phrase "samt ar-ra’s" (سمت الرأس), meaning "path above the head." Medieval Latin scholars corrupted "samt" to "cenit," which later evolved into "zenith" in Old French and English. The term initially described the celestial point directly overhead, later metaphorically extending to mean the pinnacle of achievement or power.
The sun reached its zenith at noon.
Her career was at its zenith when she won the Nobel Prize.
The empire’s zenith came under the reign of the wise king.
The rocket ascended toward the zenith before curving eastward.
His happiness was at its zenith on his wedding day.