Fundamentally is an adverb that means 'in the most basic or essential way'. It is often used to describe something that is true or important in its core, and can be used to emphasize the importance of a concept. The crossword solutions for this term include 'FIRSTLY' (7 letters), which means 'before anything else'; 'PRIMARILY' (9 letters), which means 'mainly or chiefly'; 'MOSTLY' (6 letters), which means 'for the most part'; 'RADICALLY' (9 letters), which means 'in a fundamental or drastic way'; 'ESSENTIALLY' (11 letters), which means 'in essence or in its most basic form'; 'BASICALLY' (9 letters), which means 'in a fundamental way'; 'Atheart' (7 letters), which means 'in essence or in its core'; 'Atbottom' (8 letters), which means 'in essence or in its most basic form'; and 'Inessence' (9 letters) and 'Inprinciple' (11 letters), both of which mean 'in essence or in its most basic form'. All of these words are related to the term fundamentally and emphasize the importance of understanding something in its most basic form.