In an interjectional way; having the form of an interjection.(adverb)
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Use "interjectionally" in a sentence
"In vain I looked for 'interjectionally' in the article, but I did find it in MW."
"- Webster says the origin is unknown, but it appeared in 1573 and is understood to be an expression or shout of acclaim — often used interjectionally to express joy or approbation."
"The mark of exclamation is placed after interjections and words used interjectionally; that is to say, after expressions of an exclamatory nature."