UNIQUE' (3 letters) The term 'REALLY RARE' can be broken down into two crossword solutions: 'BLOODY' (6 letters) and 'UNIQUE' (3 letters). Both words are used to describe something that is not common or ordinary. 'BLOODY' is an informal British expression that is used to emphasize the intensity of a situation or emotion, while 'UNIQUE' is an adjective that means one-of-a-kind or having no equal. Together, these two words form the phrase 'REALLY RARE, ' which is used to describe something that is extremely uncommon or hard to find.