Free Entry 1, Week 3

What does it mean to "un"? She un-does a button, but he's un-friendly. "Un" once was but is no longer; so is un-writing the same as erasing? Little girls un-friend one another like oysters' harvesting seasons, a click of the virtual button un-doing hundreds of hours of un-manning their current crushes and un-learning last year's geometry lesson. But to what un-remarkable brick wall does that click lead? Spectators find themselves un-interested.