Answer: sniffing

AnswerCrossword Clue
SNIFFINGCold sound
SNIFFINGSmelling
sniffingthe act of sniffing
sniffingInvestigate covertly, esp. to find out confidential or incriminating information about someone
sniffingDraw in air audibly through the nose to detect a smell, to stop it from running, or to express contempt
sniffingDiscover something by investigation
sniffingShow contempt or dislike for
sniffingDraw in (a scent, substance, or air) through the nose