necessary; needed; essential; necessity; need; requirement
must not (do); should not; do not; cannot
well-matched (esp. of a couple); becoming; suitable
again; once more; also; too; on the other hand; while; and
to tie; to bind; to fasten; to restrict (freedom); to tie down (with rules, regulations, etc.); to fetter
sentence-ending particle expressing doubt; sentence-ending particle expressing a rhetorical question
five times (as much); quintuple; fivefold
honest; frank; candid; honestly; frankly
to say; to utter; to name; to call; to go (e.g. "the alarm went ping"); to make a noise
considerably; fairly; quite; rather; pretty
advantage; benefit; merit; good point; plus
to speak with restraint; to understate; to downplay; to put it mildly; to say the least
to be broken; to break; to break (down); to stop working; to fall through (of a plan, deal, etc.); to collapse
bulletin board; display board; notice board; electronic bulletin board; BBS
to see; to look; to examine; to look over; to look after; to attend to; to experience
limit; limits; degree; extent; the end; the last; as long as ...
of course; certainly; naturally
to know; to be aware (of); to sense; to feel; to understand; to comprehend; to remember
inside; interior; among; within; middle; center; during
to enter; to come in; to join (a club, company, etc.); to enter (a university, the army, etc.); to be contained (in); to be included (in); to (be able to) fit (in a container, building, etc.)
everyone; anyone; no one; nobody
discovery; detection; finding
nothing but; except; no more than
not yet known; unknown; strange
to be excited; to be nervous; to be thrilled
promise; agreement; appointment; engagement; convention; rule
expressly; especially; specially; intentionally; deliberately; on purpose
to call (someone) to (the door, phone, etc.); to tell (someone) to come; to call up (on the phone); to invoke (e.g. a subroutine); to call; to open (e.g. a file)
(in a) long time; long time (ago); while (ago); long ago; long while (ago); (in a) long while
online; on the line (of a ball; in tennis, volleyball, etc.)
passion; ardor; enthusiasm; The Passion
to abbreviate; to abridge; to omit; to leave out; to take; to capture
speech; tongue; dialect; brogue; bento; Japanese box lunch; petal
before; prior to; ago; the past; before; previously
to be crowded; to be packed; to be complex; to go into; to put into; to do intently
fighting game (esp. one-on-one)
the present; present time; as of; present tense; this world; this life
one day; all day (long); the whole day; first day of the month
the number of people; many people; a large number of people
not exceeding ...; not more than ...; below (a standard, level, etc.); under; the following; the below-mentioned