The term 'JUST KNOW' can be broken down into four crossword solutions: FEEL (4 letters), INTUIT (6 letters), SENSE (5 letters), and FEELINONESBONES (15 letters). FEEL is an emotion that is experienced through physical sensations, INTUIT is to understand something instinctively without the need for conscious reasoning, SENSE is to perceive or recognize something, and FEELINONESBONES is a phrase used to describe having a strong feeling about something without any evidence. Together, these words suggest that one can have a strong understanding of something without any logical explanation.