The term 'to the extreme' can be broken down into four crossword solutions: ULTRA (5 letters), GROSSLY (7 letters), INSPADES (8 letters), and SEVERELY (8 letters). ULTRA is an adjective meaning 'far beyond what is usual or ordinary, ' while GROSSLY is an adverb meaning 'in a way that is shockingly bad or unacceptable.' INSPADES is an adverb meaning 'in a very intense or extreme way, ' and SEVERELY is an adverb meaning 'in a harsh or strict manner.' All four words are used to describe something that is done to an extreme degree.