difficulty;  hardship;  trouble;  infeasibility;  inability (to carry out)
 to climb over;  to get over;  to surmount;  to overcome;  to surpass;  to overtake
 to advance;  to go forward;  to precede;  to go ahead (of);  to make progress;  to improve;  to deepen
 repair;  mending;  fixing;  servicing
 at;  in;  at;  when;  by;  with;  and then
 to advance;  to move forward;  to carry forward (plans, work, etc.);  to proceed with;  to raise;  to elevate
 to end;  to come to an end;  to close;  to finish
 listen!;  you see;  mind you;  remember
 to understand;  to comprehend;  to become clear;  to be known;  I know!;  I think so too!
 it seems;  I think;  I guess;  right?;  don't you agree?
 to disappear;  to vanish;  to go out (of a fire, light, etc.);  to die;  to fade (of a feeling, impression, etc.);  to vanish (e.g. of hope);  to go away (e.g. of a smell, itchiness, sleepiness)
 and;  besides;  because;  since;  the thing is;  for one thing
 opponent;  rival;  adversary;  menace;  danger;  threat
 to snatch away;  to dispossess;  to steal
 operation;  functioning;  running
 in order to (e.g. meet goal);  so that;  take care (so as);  hoping or wishing for something
 to do;  to carry out;  to cause to become;  to make (into);  to serve as;  to act as;  to wear (clothes, a facial expression, etc.)
 certainly;  of course;  even if;  no matter (who, what, when, where, why, how);  without even;  without so much as;  at the (least, earliest, etc.)
 to think (about, of);  to think over;  to consider;  to bear in mind;  to think (that);  to believe;  to intend (to do)
 still;  as yet;  (not) yet;  more;  (more) still;  at least
 safety;  security;  safely;  without incident;  good health;  inaction
 you said;  he said;  if ... then;  do you seriously think that;  I already told you;  you should know by now that;  the said ...
 thing;  matter;  incident;  occurrence;  circumstances;  situation;  work
 potentiality;  likelihood;  possibility;  availability
 to be;  to exist;  to have;  to be located;  to be equipped with;  to happen
 called;  named;  as many as;  as much as;  all ...;  every single ...
 only;  just;  merely;  as much as;  to the extent of;  enough to
 but;  however;  (and) yet;  nevertheless;  still;  for all that
 even if;  even though;  even;  too;  whether ... or ...;  no matter (what, where, who, etc.)
 action;  conduct;  behaviour;  behavior;  mobilization;  mobilisation
 strange;  weird;  wonder;  mystery;  cleverness;  adroitness
 in that way;  thus;  so;  so?
 to think;  to consider;  to think (of doing);  to plan (to do);  to judge;  to assess;  to imagine
 secret;  secrecy;  mystery;  secret (e.g. to success);  esoteric teachings
 to notice;  to recognize;  to recognise;  to become aware of;  to perceive;  to realize
 strange;  odd;  unexpected;  change;  incident;  disturbance
 to become;  to get;  to result in;  to turn out;  to consist of;  to be composed of;  to be completed
 (I) think (that);  (I) have a feeling (that);  (I) fancy (that)
 order;  command;  decree;  (software) instruction;  statement
 to protect;  to guard;  to defend;  to keep (i.e. a promise);  to abide (by the rules);  to observe
 to try to ...;  to be about to do ...;  to decide to ...;  to take as;  to treat as;  to use for;  to suppose that (such) is the case