above-board vs lusterless

above-board

adj
  • In open sight; without trick, concealment, or deception. 

adv
  • Honestly; openly. 

lusterless

adj
  • Without brilliance, unremarkable. 

  • Without luster, dull, not shiny, flat or matte finished. 

How often have the words above-board and lusterless occurred in a corpus of books? (source: Google Ngram Viewer )