en_tn/pro/16/31.md

Gray hair is a crown of glory

The writer speaks of gray hair as if it were a crown. "Gray hair" is a metonym for old age. Alternate translation: "A person who has lived long enough to have gray hair is like one who wears a glorious crown on his head" (See: rc://en/ta/man/translate/figs-metaphor and rc://en/ta/man/translate/figs-metonymy)

it is gained

This can be stated in active form. Alternate translation: "a person gains it" (See: rc://en/ta/man/translate/figs-activepassive)