variants
or tear gas
or less commonly teargas
tear-gassed or tear gassed also teargassed; tear-gassing or tear gassing also teargassing; tear-gases or tear gasses also teargasses
: to use tear gas on
The troops then tear-gassed the crowd of several hundred, mostly teenagers and young men, which scattered in great confusion, but re-formed later.—
Roger Daniels
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Merriam-Webster unabridged



