sure;  certain;  reliable;  trustworthy;  If I'm not mistaken;  If I remember correctly
 underground;  below the ground;  world of the dead;  the grave;  underground (activities, movement, etc.);  secret
 short circuit;  leakage (of electricity);  electrical fault
 dangerous;  risky;  in danger;  in jeopardy;  uncertain;  unreliable
 safe;  secure;  certainly;  surely;  no thanks;  I'm good
 first (of all);  firstly;  probably;  most likely;  more or less (satisfactory);  on the whole
 this;  this one;  this person;  now;  this point (in time);  here;  used to stress the subject of a sentence
 business;  task;  use;  purpose;  for the use of ...;  used for ...
 relation;  relationship;  participation;  involvement;  influence;  effect
 to enter;  to go into;  to break into;  to join;  to enroll;  to contain;  to hold
 is that so? (generally rhetorical)
 truth;  reality;  proper;  right;  genuine;  authentic
 to be aware of;  to know;  to notice;  to feel;  to understand;  to comprehend;  to remember
 I see;  that's right;  indeed
 now;  soon;  already;  yet;  further;  more
 cold (e.g. weather);  uninteresting (esp. joke);  lame;  dull
 to return;  to come home;  to leave;  to get home;  to get to home plate
 warm;  mild;  considerate;  kind;  warm (of a colour);  mellow
 thing;  object;  one's things;  possessions;  things;  something;  quality
 to eat;  to live on (e.g. a salary);  to live off;  to subsist on
 saucepan;  pot;  stew;  hot pot
 why?;  what for?;  how?;  by what means?
 it is assuredly that ...;  can say with confidence that ...
 after all;  because;  but;  even;  too;  as well
 skillful;  skilful;  delicious;  appetizing;  fortunate;  splendid
 disagreeable;  detestable;  unpleasant;  reluctant
 number one;  first;  best;  most;  game;  round
 sukiyaki;  thin slices of beef, cooked with various vegetables in a table-top cast-iron pan
 poor (at);  weak (in);  not very good (at);  not one's cup of tea;  not one's favorite
 somewhere;  anywhere;  in some respects
 idiot;  moron;  trivial matter;  folly;  stupid;  foolish
 fellow;  guy;  thing;  object;  he;  she
 you;  presence (of a god, nobleman, etc.)
 to that extent;  to that degree;  that much;  that many
 complaint;  grumbling;  objection;  phrase;  words;  expression
 cooking;  cookery;  cuisine;  dealing with something;  handling;  administration
 anyone;  anybody;  everyone;  everybody;  whoever