subastar
auction
subasta
auction (noun)
+
-ar
verb suffix
Subastar means to auction. It's formed from the noun subasta0 (auction0) + the verb suffix -ar1, literally meaning 'to do an auction'.
verb
  1. auction
    To sell something to the highest bidder in an auction
    Van a subastar las obras de arte del museo. // They are going to auction the museum's artworks.