The term 'set adrift' can be defined as to leave someone or something without any support or guidance. This term can be broken down into two crossword solutions: UNMOOR (6 letters) and UNOOR (5 letters). UNMOOR is a verb meaning to release from an anchor or mooring, while UNOOR is a verb meaning to unbind or untie. Both words are related to the concept of being set adrift, as they both involve releasing something from a binding or mooring.