master vs under

master

adj
  • Main, principal or predominant. 

  • Original. 

  • Masterful. 

  • Highly skilled. 

noun
  • Someone who has control over something or someone. 

  • A parajudicial officer (such as a referee, an auditor, an examiner, or an assessor) specially appointed to help a court with its proceedings. 

  • A vessel having a specified number of masts. 

  • The original of a document or of a recording. 

  • A male dominant. 

  • A master's degree; a type of postgraduate degree, usually undertaken after a bachelor degree. 

  • The primary wide shot of a scene, into which the closeups will be edited later. 

  • A tradesman who is qualified to teach apprentices. 

  • The owner of an animal or slave. 

  • A skilled artist. 

  • Someone who employs others. 

  • A person holding an office of authority, especially the presiding officer. 

  • A person holding such a degree. 

  • The captain of a merchant ship; a master mariner. 

  • An expert at something. 

  • A device that is controlling other devices or is an authoritative source. 

  • A person holding a similar office in other civic societies. 

verb
  • To earn a Master's degree. 

  • To become the master of; to subject to one's will, control, or authority; to conquer; to overpower; to subdue. 

  • To be a master. 

  • To learn to a high degree of proficiency. 

  • To make a master copy of. 

under

adj
  • In a state of subordination, submission or defeat. 

  • Insufficient or lacking in a particular respect. 

  • Lower; beneath something. 

  • Under anesthesia, especially general anesthesia; sedated. 

noun
  • The amount by which an actual total is less than the expected or required amount. 

adv
  • Insufficiently. 

  • In or to a lower or subordinate position, or a position beneath or below something, physically or figuratively. 

  • In or into an unconscious state. 

  • So as to pass beneath something. 

prep
  • Using or adopting (a name, identity, etc.). 

  • Subordinate to; subject to the control of; in accordance with; in compliance with. 

  • Within the category, classification or heading of. 

  • Below the surface of. 

  • Less than. 

  • In the face of; in response to (some attacking force). 

  • In or at a lower level than; in the area covered or surmounted by. 

  • From one side of to the other, passing beneath. 

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