Therapy Toronto Therapy Toronto Psychotherapy Definitions | a | b | c | d | e | f | g | h | i | j | k | l | m | n | o | p | r | s | t | u | v | w | x | y | z CYW CYW CYW stands for 'Child and Youth Worker'. This is a credential for those who have undertaken professional training in the development and assistance of children and youth.