pore

nouns

any tiny hole admitting passage of a liquid (fluid or gas)
pore
is derived from
porous
is derived from
poriferous
is a type of (narrower)
an unoccupied space
hole
any small opening in the skin or outer surface of an animal
pore
is derived from
porous
is derived from
poriferous
is a part of
a natural protective body covering and site of the sense of touch
"your skin is the largest organ of your body"
cutis, skin, tegument
is a type of (narrower)
a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance
"the tear duct was obstructed"; "the alimentary canal"; "poison is released through a channel in the snake's fangs"
canal, channel, duct, epithelial duct
a minute epidermal pore in a leaf or stem through which gases and water vapor can pass
pore, stoma, stomate

verbs

direct one's attention on something
"Please focus on your studies and not on your hobbies"
center, centre, concentrate, focus, pore, rivet