careless;  stupid;  thoughtless;  heedless;  unobservant;  inadvertent
 outside of;  not covered by
 to step into (e.g. someone else's territory);  to break into;  to raid;  to come to grips with;  to get to the core of
 canteen;  flask;  water bottle;  thermos
 close thicket;  dense forest;  jungle;  amazon.com
 to stray into;  to lose one's way (and enter);  to wander into
 aim;  object;  expectations;  prospects;  something that can be relied upon;  snack served with alcoholic drink;  pad
 unskillful;  poor;  awkward;  imprudent;  untactful
 sports ground;  sports oval
 club activities;  extracurricular activities
 encounter;  being confronted with (e.g. difficulty);  meeting with (e.g. accident)
 out of the question;  unthinkable;  impossible
 what;  how many;  many;  a lot of;  several;  a few
 even if;  (it doesn't matter) whether (A or B or ...);  whatever;  should
 intention;  plan;  belief;  assumption;  estimate;  estimation
 bounce;  spring;  momentum;  impetus;  moment;  instant
 if;  in case;  as for;  on the topic of;  if that's the case;  if so
 studies;  schoolwork;  classwork
 to find a clear solution;  to come to a clean decision;  to give a clear explanation;  to divide exactly (without remainder);  to divide evenly
 university entrance examination
 sight (e.g. of a gun);  aim;  alignment
 to match (rhythm, speed, etc.);  to join together;  to unite;  to face;  to be opposite (someone);  to compare;  to check with
 whole life;  a lifetime;  all through life;  (the only, the greatest, etc.) of one's life
 to spoil;  to ruin;  to destroy;  to make a mess of
 to be called ...;  to be referred to as ...
 tightly (holding on);  firmly;  strongly (built);  solidly;  properly;  well
 to recover a cost;  to recover an expense;  to get a return on one's investment;  to get one's money's worth
 to return (something);  to restore;  to turn over;  to turn upside down;  to pay back;  to retaliate;  to respond (with)
 to continue;  to last;  to continue (without a break);  to be unbroken;  to occur again and again;  to lead to;  to connect to
 senior high school (esp. the senior high school section of a school that also encompasses other grades)
 back (esp. of a building, etc.);  rear;  behind
 (many) trees;  every tree;  all kinds of trees
 flower;  blossom;  cherry blossom;  beauty;  blooming (esp. of cherry blossoms);  ikebana;  hanafuda
 lingering attachment;  lingering affection;  regret;  reluctance;  ruefulness
 to be reflected;  to harmonize with (harmonise);  to come out (photo);  to be projected;  to be displayed (on a screen)
 now that you mention it;  come to think of it;  that reminds me;  on that subject;  speaking of which
 suddenly;  casually;  accidentally;  incidentally;  unexpectedly;  unintentionally
 to recall;  to remember;  to recollect
 how;  in what way;  how about