ambidextrous vs sincere

ambidextrous

adj
  • Of a person, bisexual. 

  • Exceptionally skillful; adept in more than one medium, genre, style, etc. 

  • Having equal ability in both hands; in particular, able to write equally well with both hands. 

  • Equally usable by left-handed and right-handed people (as a tool or instrument). 

sincere

adj
  • Genuine; meaning what one says or does; heartfelt. 

  • Meant truly or earnestly. 

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