musen

Etymology 1
From, of uncertain further origin.

Verb

 * 1)  To muse; to ponder:
 * 2)  To muse upon an object.
 * 3)  To wonder (at).
 * 4)  To daydream; to be lost in thought.
 * 5)  To worry; to agonize.
 * 6)  To complain (about).