There are several synonyms for the phrase "are unable to remember." Some of these include "forget," "blank out," "lose track," "fail to recall," "amnesia," "memory lapse," "slip one's mind," "draw a blank," "be unable to recollect," and "have no memory of." Often times, memory loss can be attributed to various factors such as stress, aging, lack of sleep, or illness. Regardless of the reason, when one is unable to remember, it can be frustrating and debilitating. Being able to identify and use these synonyms can help people communicate their memory issues more effectively and seek the appropriate help or treatment.