quedar
stay
queda
remains
+
-ar
verb suffix
Quedar means to stay and can be thought of as queda0 (remains0) + -ar1 (verb suffix1).
verb
  1. stay
    To stay, remain
    Voy a quedar en casa esta noche. // I'm going to stay at home tonight.
  2. meet
    To meet, arrange to meet
    Quedamos a las 8 en el restaurante. // We're meeting at the restaurant at 8.