Joseph called the name of the first-born Manasseh, "For," he said, "God has made me forget all my hardship and all my father's house." (RSV, Genesis 41:51)
The name Manasseh is written as מנשה (me'na'sheh, Strong's #4519). This name/word comes from the root נשה (N.Sh.H, Strong's #5382) meaning to "forget" and is used in the above verse. The name/word me'na'sheh means "forgotten."