The term 'evil smile' can be described by two crossword solutions: LEER (4 letters) and SNEER (5 letters). A LEER is a facial expression that is often seen as sly, knowing, or mischievous. It is usually accompanied by a sideways glance and a smirk. A SNEER, on the other hand, is a facial expression of contempt or derision. It is characterized by a curled lip and a scornful look. Both expressions are often used to convey a sense of malice or evil intent.