Smart Definition
Etymology
Conjugation
Pronunciation
callar
to be silent
call
to speak or shout
+
-ar
verb suffix
Callar means to be silent, which is the opposite of call0 (to speak or shout0). It's a verb1 ending in -ar1.
verb
  1. to be silent
    To be silent or quiet
    Por favor, calla mientras estoy hablando. // Please be silent while I'm speaking.