Have a hunch is an expression that means to have a feeling or an intuition about something without having any concrete evidence. INTUIT, which has 6 letters, is a verb meaning to understand something instinctively without the need for conscious reasoning. SENSE, which has 5 letters, is a verb meaning to perceive or recognize something through the use of one's senses. FEEL, which has 4 letters, is a verb meaning to experience a physical sensation or emotion. Together, these three words can be used to describe the expression 'have a hunch'.