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Use "unmemorable" in a sentence
"My Memorial Day is being spent in unmemorable travel, starting at about 10: 00 a.m. in Cannon Beach, Oregon, and concluding well past midnight Central time."
"The really sad bit is that it's that search for graphical supremacy that's made modern games so bland, lifeless, and unmemorable."
"In August 2007, otherwise unmemorable heavy rains shut down much of the subway system."