noun
age 60; sexagenarian
From the Analects of Confucius: at 60, one's ear becomes attuned and one can follow the will of heaven without conflict. Used in formal or literary contexts to refer to the age of 60.
孔子は六十にして耳順す。
Confucius said, 'At sixty, my ear was attuned.'
祖父は耳順を迎え、ますます穏やかになった。
My grandfather reached the age of 60 and became even more serene.