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Use "grinningly" in a sentence
"The harshest critique I heard was from my dad, who grinningly said "It sounds like you're having too much fun.""
"He seized it with his left hand, with a quick pull and twist wrenched it off, and grinningly tossed it, as a joke, into the pandanus basket which still his wife with one hand held before him while with the other she clutched her forehead bleeding from a flying fragment of pistol."
"It's silly and patronising and, anyway, even the most witless bores in society have long since moved on to grinningly saying "simples" in a daft foreign accent at the end of their sentences."