unmemorable

adjective

1. worth remembering; notable: a memorable speech.
2. easily remembered.

adjective

1. not worth remembering or easily remembered

adjective

1. worth remembering or easily remembered; noteworthy

adj.mid-15c., from Middle French mémorable, from Latin memorabilis “that may be told; worthy of being remembered, remarkable,” from memorare “to bring to mind,” from memor “mindful of” (see memory). Related: Memorably.