I love these words with a long history. =) To mix things up today, I’m going to present this one as a
list. Wanna take a guess as to which one I was looking up for the end of my spy story? LOL

Primary use (you know, the part of your face) – Old English
Used of any prominent or projecting part – 1530s.
To say something is under (one’s) nose “in plain view” – 1540s
(verb) to perceive the smell of – 1570s
something obvious – 1590s.
Pay through the nose (bleed) – 1670s
(verb) to pry, search – 1640s
To turn up one’s nose, “show disdain”  – 1818 (earlier hold up one’s nose, 1570s)
Odor, scent (the nose of a perfume) – 1894
Many extended meanings are from the horse-racing sense
of length of a horse’s nose, as a measure of distance between two
finishers – 1908
(verb) to look down one’s nose – 1921