The term 'MOST SUCCINCT' can be defined as being expressed in the fewest words possible. The two crossword solutions for this term are 'TERSEST' (7 letters) and 'PITHIEST' (8 letters). Both of these words are synonyms for 'SUCCINCT, ' meaning they describe something that is brief and to the point. Tersest is derived from the Latin word 'tersus, ' which means 'SMOOTH' or 'POLISHED, ' while pithiest is derived from the Old English word 'PITH, ' which means 'essential part.' Therefore, both words imply that something is expressed in a concise and precise manner.