n. 25B6; verb
the enterprise had failed : BE UNSUCCESSFUL, not succeed, fall through, fall flat, collapse, founder, backfire, meet with disaster, come to nothing/naught; informal flop, bomb.
he failed his examination : BE UNSUCCESSFUL IN, not pass; not make the grade; informal flunk.
his friends had failed him : LET DOWN, disappoint; desert, abandon, betray, be disloyal to; poetic/literary forsake.
the crops failed : BE DEFICIENT, be insufficient, be inadequate; wither.
the daylight failed : FADE, dim, die away, wane, disappear, vanish.
the ventilation system failed : BREAK (DOWN), stop working, cut out, crash; malfunction, go wrong, develop a fault; informal conk out, go on the blink; Brit. informal pack up, play up.
Ceri's health was failing : DETERIORATE, degenerate, decline, fade, wane, ebb.
900 businesses are failing a week : COLLAPSE, crash, go under, go bankrupt, go into receivership, go into liquidation, cease trading, be wound up; informal fold, flop, go bust, go broke, go to the wall.
succeed, pass, thrive, work.
25A0; without fail WITHOUT EXCEPTION, unfailingly, regularly, invariably, predictably, conscientiously, religiously, whatever happened.