Is it possible to say "Risk ing"? Is it correct grammar?
Yes, it is correct grammar to use "risk + verb ending in -ing" in this case. "Risk" in this context is a verb, and it can be followed by a noun. Verbs ending in -ing, also called "gerunds", are the noun forms of verbs. "Losing" in this case functions as a noun, and so it is correct to say "risk losing".
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