Take a peek is an idiom that means to take a quick LOOK at something. It can be used to describe a brief glance or a more thorough inspection. The crossword solutions for this term are LOOK and LOOKIN, both of which are four and six letters respectively. LOOK is a verb meaning to use one's eyes to observe something, while LOOKIN is a present participle form of the same verb. Together, these two words provide a succinct description of the phrase 'take a peek'.