In a frozen or emotionally cold manner; with complete stillness or lack of warmth.
From frozen (past participle of freeze) plus the adverbial suffix -ly. This creates an adverb describing either literal frozen states or metaphorical emotional coldness expressed through action or demeanor.
Imagine someone staring 'frozenly' at something terrible—the adverb captures not just stillness but a kind of emotional paralysis that comes from shock or heartlessness.
Complete word intelligence in one call. Free tier — 50 lookups/day.