soler
to usually
sole
only
+
-er
verb suffix
Soler means to usually. Think of it as sole0 (only0) + -er1 (verb1), as in 'the only way you usually do something'.
verb
  1. to usually
    To usually do something or be accustomed to doing something
    Suelo desayunar a las 8 de la mañana. // I usually have breakfast at 8 in the morning.