· any tiny hole admitting passage of a liquid (fluid or gas)
Hypernym(s): hole
· any small opening in the skin or outer surface of an animal
Hypernym(s): duct, epithelial_duct, canal, channel
· a minute epidermal pore in a leaf or stem through which gases and water vapor can pass
Hypernym(s): aperture
· direct one's attention on something; "Please focus on your studies and not on your hobbies"
Synonym(s): concentrate, focus, center, centre, rivet
Hypernym(s): think, cogitate, cerebrate