To make smooth or shiny by rubbing; to polish; to shine. Example: In pottery, a stone is sometimes used to burnish a pot before firing, giving it a smooth, shiny look.
To shine forth; to brighten; to become smooth and glossy, as from swelling or filling out; hence, to grow large.
(metaphoric) To make appear positive and highly respected.
All clues having "BURNISH"
for an answer:
You can find a list of possible crossword clues for BURNISH below.