concentration; focusing; convergence; within a collection of works
battle; fight; war; struggle; conflict
limit; limits; degree; extent; the end; the last; as long as ...
hand; arm; forepaw; foreleg; handle; hand; worker
to open (e.g. doors); to open (e.g. business, etc.); to be empty; to be vacant; to be available; to be open (e.g. neckline, etc.); to have been opened (of one's eyes, mouth, etc.)
to differ (from); to vary; to not be in the usual condition; to not match the correct (answer, etc.); to be different from promised; isn't it?
everyone; everybody; all; everything; all
to be wrought up; to be on edge; to get irritated; to get excited (about); to be unsettled
funny; amusing; strange; odd; improper; unsuitable
will; desire; ambition; urge (e.g. creative urge)
high; tall; expensive; high-priced; high (level); above average (in degree, quality, etc.)
that being the case; because of ...; the reason is ...; given that ...
does not seem; unlikely; improbable
now that you mention it; come to think of it; that reminds me; on that subject; speaking of which
shaking; shake; unsettledness; instability; existence of multiple spellings, pronunciations, usages, etc. for a single word
overheating; overexcitement
to begin (doing); to start (doing)
no good; not serving its purpose; hopeless; wasted; cannot; must not
to be able (in a position) to do; to be up to the task; to be ready; to be completed; to be made; to be built; to be good at
that's the way it is; yes; is that so?; is it?
groan; moan; roar; howl; hum (e.g. motor); buzz (e.g. bee, wire in wind)
out (of a ball, in tennis, etc.); outside the line; out; putout; outer; external; exit
to do; to carry out; to cause to become; to make (into); to serve as; to act as; to wear (clothes, a facial expression, etc.)
by the way; incidentally; sometimes; occasionally; precisely (at that time); exactly
medium; average; moderation; middle school; China; volume two (of three); during (a certain time when one did or is doing something)
to get up; to rise; to wake up; to be awake; to occur (usu. of unfavourable incidents); to happen
strangeness; abnormality; disorder
diligently; seriously; perfectly; properly; sufficiently; satisfactorily
to move; to stir; to operate; to run; to make a move; to take action; to be touched
wooden figure; wooden doll; puppet; blockhead; good-for-nothing; fool
firing (esp. a rocket or missile); launching; shooting; ejaculation
to continue; to keep up; to keep on
one machine; one aircraft; one life
but; however; even; however; no matter how; ... or something; either ... or ...
aviation; flight; flying; to fly; to take a flight
danger; peril; hazard; risk