opposite effect;  adverse effect;  backfiring
 robust health;  able-bodied
 self-healing;  spontaneous recovery
 sign;  indication;  omen;  symptom
 tradition;  legend;  folklore
 fairy tale;  fairy story;  nursery tale
 nothing;  naught;  nought;  un-;  non-
 illness;  disease;  bad habit;  weakness;  fault
 to rule;  to govern;  to administer
 lethality;  killing effectiveness
 in the twinkling of an eye;  in a flash
 annihilation;  total destruction;  complete destruction;  crushing defeat
 beyond;  across;  the other side;  the distance
 exile;  banishment;  eviction;  elimination (e.g. of poverty);  removal
 to seal (letter);  to prevent;  to forbid;  to block
 to be lost (e.g. luggage);  to be missing;  to be used up;  to be run out;  to disappear (e.g. pain);  to be lost (e.g. a dream, confidence)
 after (practically) no time;  immediately after;  just;  having no time to
 spread;  span;  expanse;  extent
 fast;  quick;  early (in the day, etc.);  premature;  (too) soon;  not yet
 isolation;  segregation;  separation;  quarantine
 pardon;  forgiveness;  tolerance;  leniency;  mercy;  going easy (on someone)
 one Nth part (e.g. one fifth, one tenth);  one out of N
 from out of nowhere;  from who knows where
 black magic;  sorcery;  magic tricks;  juggling
 characteristic (of);  peculiar (to)
 therapeutic agent;  remedy;  medicine;  drug;  cure
 it cannot be that...;  it is highly unlikely that...;  it is impossible that...
 administration (of medicine)
 complete recovery of health
 unprecedented;  record-breaking
 (of a kind) never to be seen again
 to see without obstruction;  to see through;  to forecast;  to predict;  to anticipate
 scientific capability;  scientific ability (e.g. of a student);  scientific strength (e.g. of a country);  level of technological development