The word "suspect" generally refers to a belief or idea that something may be true or may have happened, often without having definitive proof. It can also refer to a person who is believed to be guilty of a crime or misconduct. When you suspect something, you have a feeling or intuition about it, often one that is cautious or doubtful.
The word "suspect" originates from the Latin "suspectus," which means "looked up at" or "regarded," derived from "suspicere," meaning "to look up at, to regard with suspicion." It entered the English language in the late Middle Ages.