attenuate vs exhaust

attenuate

verb
  • To become thin or fine; to grow less. 

  • To reduce the amplitude of an electrical, radio, or optical signal. 

  • To weaken. 

  • To reduce in size, force, value, amount, or degree. 

  • To rarefy. 

  • (of a beer) To become less dense as a result of the conversion of sugar to alcohol. 

  • To reduce the virulence of a bacterium or virus. 

  • To make thinner, as by physically reshaping, starving, or decaying. 

adj
  • Gradually tapering into a petiole-like extension toward the base. 

exhaust

verb
  • to tire out; to wear out; to cause to be without any energy 

  • To empty by drawing or letting out the contents 

  • To bring out or develop completely 

  • To discuss thoroughly or completely 

  • To subject to the action of various solvents in order to remove all soluble substances or extractives 

  • To draw or let out wholly; to drain off completely (:liquid) 

  • To use up; to deplete, drain or expend wholly, or until the supply comes to an end 

noun
  • An exhaust pipe, especially on a motor vehicle. 

  • A system consisting of the parts of an engine through which burned gases or steam are discharged; see also exhaust system. 

  • The steam let out of a cylinder after it has done its work there. 

  • The dirty air let out of a room through a register or pipe provided for the purpose. 

  • exhaust gas. 

How often have the words attenuate and exhaust occurred in a corpus of books? (source: Google Ngram Viewer )