most difficult; next to impossible
to place in a row; to line up; to list; to enumerate; to talk a lot of nonsense; to tell a lot of lies
degree of difficulty; difficulty level
dramatic; exciting; touching; extreme
probe each other; sound each other out
lump (of flour, etc.); clump (of ground meat, etc.)
match; game; bout; contest
to be due to; to be caused by; to depend on; to turn on; to be based on; to come from
back (side); reverse; other side; inside; background; dark side (e.g. of society)
completion; conclusion; perfect (tense, form, aspect)
(power of) understanding; comprehensive faculty
to be ill; to suffer from; to worry about; to be concerned about; to have trouble doing ...; to be unable to ...
school grades; academic results
to earn (income); to make (money); to score (points, victory); to gain (time); to work hard (at one's job); to labor
to give a warning; to remind (a person) of
unconditionally; as a rule
exactly right!; indeed; damn straight
to declare; to assert; to state definitively; to finish saying; to say it all; to finish one's sentence
target; object (of worship, study, etc.); subject (of taxation, etc.)
(having) life-and-death power (over)
to make a mistake (in); to commit an error; to be wrong; to be incorrect; to mislead; to misguide
development; growth; development (of a situation, story, etc.); advancement; playing around; having an active sex life
another time; again; over again; formally; especially; intentionally
rest; recess; vacation; holiday; dormancy (of a silkworm prior to moulting)
to compare; to make a comparison; to compete; to vie
to assign; to allot; to divide among; to distribute; to prorate; to assess
to build up; to complete; to construct; to make up; to fabricate; to invent
one-by-one; separately; in detail
to mix with; to be mixed; to be mingled
mixing; mixture; meld; miscegenation
function; facility; faculty; feature
in general; generally; mostly; gist; point; main idea
front and rear; front and back; before and after; around; about; order; context
composition; formation; organization; organisation; compilation
abstention; nonparticipation
to find out; to discover; to locate
to narrow in (on); to home in; to focus; to target
(random) guess; guesswork; shot in the dark; conjecture
to remove; to take off; to drop (e.g. from a team); to remove (from a position); to leave (e.g. one's seat); to go away from
disadvantage; drawback; demerit; bad point; minus
very; considerably; by no means; not readily; middle; half-way point
previous time; last time; previous installment; previous instalment; previous session
concrete; definite; specific; material; substantial