Wiktionary
unpurse
vb. (context transitive English) To bring (one's lips) back from a pursed expression.
Usage examples of "unpurse".
But I went directly to The Living Sakhyan, squatted before Him in His wise, and unpursed my chewed Assignment.
The waiter pursed his lips, then, unpursing them, said, "The chefs doing a special on Patha eggs.