The term 'appear threatening' can be summarized by the word 'IMPEND, ' which is a six-letter word meaning to threaten or loom over. It is derived from the Latin word 'impendere, ' which means to hang over or weigh down. IMPEND is often used to describe a situation in which something bad is about to happen, such as a storm or an impending disaster. It can also be used to describe a person who appears to be a threat, such as a bully or an intimidating figure.