Greying means turning grey with age. Greying at the temples, greying hair.
Each hair turns rather than fading, since the follicle simply stops making pigment. When greying begins is mostly inherited and has nothing to do with stress, whatever people say.
1adjectivegreyingTurning grey with age.
“He was greying at thirty and entirely grey by fifty.”
greying is a quality.
Also accepted in games: graying
Proto-Indo-European
*gʰreh₁-
Middle English
grey
English
grey
English, today
greying
grey comes from Middle English grey. From Middle English grey, from Old English grēġ (Anglian). The spelling grey reflects the Anglian vowel development, whereas the variant gray stems from the West Saxon form grǣġ (through Middle English gray). Further derived from Proto-Germanic grēwaz (compare Dutch grauw, German grau, Old Norse grár), from Proto-Indo-European ǵʰreh₁- (“to green, to grow”) (compare Latin rāvus (“grey”), cu зьрѭ (“to see, to glance”), Russian зреть (“to watch, to look at”) (archaic), Lithuanian žeriù (“to shine”)).
Etymology from Wiktionary, CC BY-SA