powerful brownish-yellow bear of the uplands of western North America
"The hikers froze in awe as a grizzly lumbered out from behind the pine trees, its massive paws crushing dry leaves underfoot."
A grizzly bear.
"The ranger spotted a massive grizzly foraging near the riverbank and immediately advised everyone to turn back."
showing characteristics of age, especially having grey or white hair
"whose beard with age is hoar"
"nodded his hoary head"
Grey-haired, greyish.
"After hours of waiting for his flight, he began grizzily complaining about every minor inconvenience the airline staff could possibly overlook."
Crying or whingeing in a bad-tempered or irritable way.