Sudden inspiration is a term used to describe an IDEA or thought that comes suddenly and unexpectedly. It can be described as a 'eureka' moment, when a person has a sudden insight or realization. In this crossword, the solutions for sudden inspiration are IDEA (4 letters), GASP (4 letters), and BRAINWAVE (9 letters). IDEA is a noun meaning a thought or suggestion as to a possible course of action. GASP is a verb meaning to take a quick, sharp intake of breath, usually in surprise or shock. BRAINWAVE is a noun meaning a sudden, brilliant, or timely IDEA.