The term 'delve into' can be broken down into eight different crossword solutions: SIFT (4 letters), CHECK (5 letters), SEEK (4 letters), EXAMINE (7 letters), INVESTIGATE (11 letters), PROBE (5 letters), DIG (3 letters), and EXPLORE (7 letters), PRY (3 letters). To delve into something means to look deeply into it, often with the intention of uncovering information or knowledge. It can involve researching, questioning, analyzing, and examining a subject in order to gain a better understanding of it.