Flora and fauna (= plants and animals) Fauna

deplete

​deplete (something) to reduce something by a large amount so that there is not enough left; to be reduced by a large amount

• 
  Food supplies were severely depleted.
  
• 
  Supplies are depleting fast.
  
1. 
   Intensive fishing is depleting fish stocks in the North Sea.
   
2. 
   CFCs were widely used compounds which depleted the earth's ozone layer.
   
3. 
   Our cash reserves are being depleted at an alarming rate.
   

inert

without power to move or act

• 
  He lay inert with half-closed eyes.
  
• 
  The president has to operate within an inert political system.
  

mono-

​(in nouns and adjectives)one; single

• 
  monorail
  
• 
  monogamy
  

inhale

​to take air, smoke, gas, etc. into your lungs as you breatheSYNONYM breathe in

• 
  She closed her eyes and inhaled deeply.
  
• 
  He inhaled deeply on another cigarette.
  
• 
  Lift your arms above your head and inhale as you stretch.
  

squeak

1. 
   ​[intransitive] to make a short high sound that is not very loud
   
   • 
     My new shoes squeak.
     
   • 
     The mouse ran away, squeaking with fear.
     
   • 
     One wheel makes a horrible squeaking noise.
     

vanish

to disappear suddenly and/or in a way that you cannot explain

• 
  He turned around and vanished into the house.
  
• 
  The magician vanished in a puff of smoke.
  
• 
  My glasses seem to have vanished.
  
• 
  He vanished without trace.