The term 'unavoidably' is an adverb that means something that cannot be avoided or prevented. It is often used to describe a situation that is inevitable or certain to happen. The crossword solutions for this term are 'perforce' (8 letters) and 'INEVITABLY' (10 letters). Both of these words are synonyms for 'unavoidably' and mean that something is certain to occur, regardless of any attempts to prevent it.