approval vs slur

approval

noun
  • An expression of favorable acceptance and encouragement; a compliment that also condones. 

  • Something mailed by a seller to a collector to match their stated interests; the collector can approve of or return the item. 

  • An expression granting permission; an indication of agreement with a proposal; an acknowledgement that a person, thing, or event meets requirements. 

slur

noun
  • An insinuation or innuendo. 

  • In knitting machines, a device for depressing the sinkers successively by passing over them. 

  • An act of running one's words together; poor verbal articulation. 

  • A mark, stain, or smear; (by extension) a slight occasion of reproach. 

  • A disparaging insult or slight, particularly one used to denigrate a specific group. 

  • A set of notes that are played legato, without separate articulation. 

  • The symbol indicating a legato passage, written as an arc over the slurred notes (not to be confused with a tie). 

verb
  • To run together; to articulate poorly. 

  • To insult or slight. 

  • To play legato or without separate articulation; to connect (notes) smoothly. 

  • To soil; to sully; to contaminate; to disgrace. 

  • To cover over; to disguise; to conceal; to pass over lightly or with little notice. 

  • To cheat, as by sliding a die; to trick. 

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