"sniffs" in the noun sense
1. sniff, snuff
sensing an odor by inhaling through the nose
"sniffs" in the verb sense
1. sniff, whiff
perceive by inhaling through the nose
"sniff the perfume"
2. sniff, sniffle
inhale audibly through the nose
"the sick student was sniffling in the back row"
Source: WordNet® (An amazing lexical database of English)
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