The term 'cause to err' can be broken down into four crossword solutions: TRIPPED (7 letters), HUMAN (5 letters), SIN (3 letters), and TRIPUP (6 letters). TRIPPED is an action verb meaning to stumble or lose one's balance, while HUMAN refers to a person or the species Homo sapiens. SIN is an immoral act or thought that goes against religious or moral laws, and TRIPUP is a verb meaning to cause someone to make a mistake or fail. Together, these words suggest that humans are capable of causing others to make mistakes or fail due to their own immoral actions.