The term 'sinister look' can be described by two crossword solutions: 'LEER' (4 letters) and 'evileye' (7 letters). A LEER is a sly, knowing, or mocking look, usually with a hint of malice. It is often used to describe someone who is looking at another person in a suggestive or intimidating way. An evileye is a look that conveys a feeling of evil or malice. It is often used to describe someone who is looking at another person with a threatening or menacing expression. Both terms are used to describe a look that is intended to intimidate or unnerve the person being looked at.