A new word or phrase from the Hans Wehr dictionary, every Wednesday.
أوج auj highest point, acme, pinnacle; culmination, climax; apogee (astron.); peak (fig.; of power, of fame)
Root: ء-و-ج
Page: 42*
Example: “في ذلكَ الحِين، كانَ في أَوْجِ قُوَّتِهِ”
Translation: “at that time, he was at the peak of his strength”
* The Hans Wehr Dictionary of Modern Written Arabic, 4th Edition
The Arabic Pages 
Very helpful