two hundred kilo meters per hour
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Fast
fast
Fast can be both an adjective and an adverb for "moving fast" (rapid, rapidly), and for "held fast" (secure, securely). The car drove fast. (adverb) The line must be tied fast to the pier. (adverb) * The form fastly, when used, refers to this second meaning.
As fast as you can throw it.
No. The word fast is not a compound word.