pore

Noun

• a minute epidermal pore in a leaf or stem through which gases and water vapor can pass

• any small opening in the skin or outer surface of an animal

• any tiny hole admitting passage of a liquid (fluid or gas)

Verb

• direct one's attention on something
  • Please focus on your studies and not on your hobbies
    

Related words

• Synonyms: 
  stoma , stomate , concentrate , focus , center , centre , rivet