Mentally confused is a term used to describe someone who is disoriented, confused, or unable to think clearly. This can be caused by a variety of factors such as stress, fatigue, or mental illness. The crossword solutions for this term are ADDLE (5 letters), GAGA (4 letters), and MUDDLEHEADED (12 letters). ADDLE is an old-fashioned word meaning to become confused or muddled. GAGA is a slang term for someone who is mentally confused or disoriented. MUDDLEHEADED is an informal term for someone who is confused or disoriented.