The term 'NOT AT ALL TOUGH' can be broken down into two crossword solutions: 'NOT' (3 letters) and 'EASY' (4 letters). The word 'NOT' is an adverb that means 'in no way; certainly not'. It is used to express negation or refusal. The word 'EASY' is an adjective that means 'requiring little effort; not difficult or complex'. It is often used to describe something that can be done with minimal effort. Together, these two words form the phrase 'NOT AT ALL TOUGH', which means something is very simple and requires no difficulty.