Simple past tense and past participle of sniff.(verb)
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Use "sniffed" in a sentence
"Suburbia, one returnee sniffed, is "just a giant echoing space.""
"We had delays exchanging versions of the settlement documents because the Black Hat lawyer didn't have a laptop with him, and I kept getting my password sniffed and locked out of my e-mail account whenever I would use the wireless."
"Once I couldn't remember where I had left it in my camper so I "sniffed" it out."