The term 'adverse beginning' can be summarized as a start that is unfavorable or hostile. It is often used to describe a situation in which a person or group of people are faced with an obstacle or challenge that is difficult to overcome. The crossword solution for this term is 'ANTI, ' which is a prefix meaning 'AGAINST' or 'opposed to.' This prefix is often used to describe something that is the opposite of what is expected or desired.