The term 'by nature' can be broken down into six crossword solutions: NATURAL (7 letters), INBRED (6 letters), INERT (5 letters), BORN (4 letters), NAUGHTY (7 letters), and INESSENCE (9 letters). NATURAL refers to something that is in accordance with the normal course of things, while INBRED implies something that is inherited or innate. INERT suggests something that is motionless or inactive, while BORN implies something that is brought into existence. NAUGHTY implies something that is mischievous or disobedient, and INESSENCE suggests something that is fundamental or essential. Together, these words suggest that something is inherent or intrinsic to a person or thing.