noun (n)

• (physics) opposition to magnetic flux (analogous to electric resistance)(noun.phenomenon)

  source: wordnet30
• a certain degree of unwillingness(noun.attribute)

  Example:
  A reluctance to commit himself.
  

  Synonym:
  disinclination, hesitancy, hesitation, indisposition
  

  source: wordnet30
• The state or quality of being reluctant; repugnance; aversion of mind; unwillingness; -- often followed by an infinitive, or by to and a noun, formerly sometimes by against.(noun)

  source: webster1913
• Magnetic resistance, being equal to the ratio of magnetomotive force to magnetic flux.(noun)

  source: webster1913