The term 'I KNEW IT!' can be represented by four different crossword solutions: AHA (3 letters), HAH (3 letters), YES (3 letters), and TOLDYA (6 letters). AHA is an expression of surprise or realization, while HAH is an expression of triumph or joy. YES is an affirmative answer, and TOLDYA is a phrase used to express that one was right about something. All of these words together express the sentiment of knowing something before it happened and being right about it.