The term 'go under' can be interpreted in many ways. The crossword solutions for this term include 'SUBMIT' (6 letters), 'FALL' (4 letters), 'FOUNDER' (7 letters), 'submerse' (8 letters), 'FAIL' (4 letters), 'SINK' (4 letters), 'DROWN' (5 letters), 'scuba' (5 letters), 'CAPSIZE' (7 letters), 'REGRESS' (7 letters), 'SCUTTLE' (7 letters), 'EXCAVATE' (8 letters), and 'SUBMERGE' (8 letters). These words all have to do with going down, either literally or figuratively. To SUBMIT is to give up control, to FALL is to descend, and to FOUNDER is to FAIL. Submerse, SINK, DROWN, and scuba all refer to going underwater, while CAPSIZE and SCUTTLE refer to boats tipping over and sinking. REGRESS and EXCAVATE both involve going back in time, and SUBMERGE is to go beneath the surface of a liquid.