1. more grizzled; having more gray or white hairs mixed with darker ones
Usage: comparative form of grizzly
2. more frightening or gruesome
Usage: comparative form of grizzly; informal

Examples

• His beard looked grizzlier after months in the wilderness.
• The old prospector’s hair had grown grizzlier with each passing winter.
• The crime scene was even grizzlier than the detective had expected.
• Each story he told became grizzlier than the last.
• The mountain man’s appearance grew grizzlier as he aged.
• The horror movie’s second half was much grizzlier than the first.