frantic;  frenetic;  inevitable death;  brinkmate (inevitable checkmate)
 bringing certain death;  deadly;  knockout (blow)
 desperately;  for one's dear life
 indispensable;  essential;  requisite;  required;  compulsory;  necessary
 killer technique;  surefire assassination method;  special or lethal move, usu. one unique to a certain fighter or fighting style
 inevitable;  necessary;  foregone;  brinkmate (inevitable checkmate)
 victory goes to the one who makes the first move;  being quick to take action leads to victory;  the early bird gets the worm
 compulsory subject;  required subject
 must-see;  not to be missed;  a must
 required subject;  compulsory course
 even the prosperous inevitably decay;  sic transit gloria mundi;  all that's fair must fade
 handbook;  manual;  vade mecum;  essential item;  must-have
 success on the first try (attempt)
 to be inevitable;  to be certain;  to resolve (to do)
 must arrive;  must be received
 inevitable decline (decay, collapse, etc.)
 circular error probability (measure of missile accuracy);  circular error probable;  CEP
 must-have;  indispensable item;  necessities
 certain victory;  sure victory;  invincibility
 mandatory requirements (e.g. qualifications, administrative structures, etc.)
 Defeat is inevitable for one who goes second;  Being slow to take action inevitably leads to defeat
 required entry (e.g. in online forms)
 contextually required element
 contextually required token
 mandatory attribute;  required attribute
 government rules on structure, staffing, etc. of local bodies (e.g. police force)
 necessity guaranteed to cure
 Defeat is inevitable for an overconfident army;  Being arrogant and overconfident inevitably leads to defeat (failure);  Pride comes before a fall