Collapse under pressure is a phrase that describes the inability to cope with a difficult situation. The crossword solutions for this term are BUCKLE (6 letters), CHOKE (5 letters), CAVE (4 letters), GIVE (4 letters), and SAG (3 letters). BUCKLE means to bend or break under pressure, CHOKE means to be unable to breathe due to pressure, CAVE means to GIVE in to pressure, GIVE means to yield to pressure, and SAG means to become weak or droop under pressure.