angustiar
distress
anguish
severe mental or physical pain
+
-ar
verb suffix
Angustiar means to distress and can be thought of as the verb form of anguish0 (severe mental or physical pain0) with the -ar1 verb suffix1.
verb
  1. distress
    To cause anguish, distress, or anxiety
    La situación económica angustia a muchas familias. // The economic situation distresses many families.