free (of restraint, controls, etc.);  free (of cost);  freelance;  one-size
 by myself;  in person;  by oneself
 difficult to ...;  hard to ...
 question (e.g. on a test);  problem;  problem (e.g. societal, political);  question;  question (i.e. doubt);  public discussion
 request;  favour (to ask);  wish;  please
 middle and high school;  medium and high (level)
 student (esp. a university student)
 two persons;  two people;  pair;  couple
 email;  mail (usu. in compound words);  post;  message (sent over a chat application);  instant message;  male
 of course;  certainly;  naturally
 to do completely;  to do accidentally;  to do without meaning to;  to happen to do
 like;  similar to;  (I) think (that);  (I) have a feeling (that);  feels like;  feels similar to
 counter;  window;  teller window;  contact person;  point of contact
 consequence;  outcome;  result;  blame
 sex;  sexual intercourse;  (one's) sex;  gender
 to turn up;  to roll up (e.g. sleeves);  to do over and over again;  to do relentlessly;  to stage a comeback (against) (in mahjong, horse racing, etc.);  to come from behind
 it is, isn't it?;  I know, right?;  innit?
 to mind (negative nuance);  to care about;  to worry;  to pay undue (amount of) attention to (something)