frank vs underhanded

frank

adj
  • unmistakable, clinically obvious, self-evident 

  • honest, especially in a manner that seems slightly blunt; candid; not reserved or disguised. 

noun
  • The notice on an envelope where a stamp would normally be found. 

  • A hot dog or sausage. 

  • The grey heron. 

  • A pigsty. 

  • Free postage, a right exercised by governments (usually with definite article). 

verb
  • To exempt from charge for postage, as a letter, package, or packet, etc. 

  • To shut up in a frank or sty; to pen up; hence, to cram; to fatten. 

  • To place a frank on an envelope. 

  • To send by public conveyance free of expense. 

underhanded

adj
  • Done by moving the hand (and arm) from below. 

  • Sly, dishonest, corrupt, cheating. 

  • Insincere; sarcastic. 

  • An underhanded compliment is actually criticism. 

  • Secret; surreptitious. 

  • His underhanded trick backfired and he was disqualified. 

  • Understaffed. 

noun
  • Devious people, collectively. 

adv
  • In an underhanded manner. 

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