A bit of wisdom is a phrase or saying that conveys a moral lesson or truth. It is often used to provide guidance or advice in difficult situations. The four crossword solutions for the term 'bit of wisdom' are AXIOM, ADAGE, PEARL, and NUGGET. An AXIOM is a self-evident truth or a statement accepted as true without proof. An ADAGE is a proverb or wise saying that has been passed down through generations. A PEARL is a metaphor for something precious or valuable, usually referring to a piece of wisdom. Finally, a NUGGET is a small, valuable piece of information or advice.