Broken-down and Gray-haired

Broken-down adjective - Not in working order.

Gray-haired and broken-down are semantically related. In some cases you can use "Gray-haired" instead an adjective phrase "Broken-down".

Gray-haired adjective - Showing characteristics of age, especially having grey or white hair.

Broken-down and gray-haired are semantically related. Sometimes you can replace phrase "Broken-down" with "Gray-haired", this phrases are similar.