The term 'DEFEATIST's word' is a phrase used to describe a negative attitude or outlook. It is often used to describe someone who has given up hope and believes that they CANNOT succeed. The two crossword solutions for this term are CANNOT (6 letters) and CANT (4 letters). CANNOT is an emphatic form of the verb 'CAN' which expresses an inability or lack of power to do something. CANT is a noun meaning a type of language or jargon used by a particular group or profession. Both words express a sense of helplessness and lack of control, which is why they are used to describe a DEFEATIST's attitude.