xiù
to smell
to sniff; to nose
嗅探
xiù tàn
to sniff (in order to find sth)
嗅探犬
xiù tàn quǎn
sniffer dog
嗅球
xiù qiú
olfactory bulb (anatomy)
嗅觉
xiù jué
sense of smell
嗅盐
xiù yán
smelling salts