tornado; whirlwind; waterspout; twister
boundary; (nuclear) criticality; critical (mass, pressure, temperature, state, point, etc.)
gear; speed (e.g. 4-speed transmission)
the world; society; sphere; circle; world-renowned; world-famous
to; for; from the standpoint of; as far as ... is concerned
exceedingly; extremely; decisively
nice; likeable; desirable
to whisper; to murmur; to rumor; to rumour
to send; to dispatch; to see (someone) off; to escort; to bid farewell to (the departed); to say goodbye to; to spend (time)
essence; true nature; substance; reality
(some) more; even more; longer; further
deep (hole, forest, snow, etc.); dense (e.g. fog); thick (e.g. weeds, woods); close (e.g. relationship); deep (involvement); intense (e.g. longing, flavor); severe
dark; gloomy; depressed; dispirited; dark (in colour); dull; ill-boding
attachment; adhesion; insistence; tenacity; fixation; obsession
after all; because; but; even; too; as well
rotation; revolution; working (e.g. of one's mind); function; turnover (of goods, funds, etc.); circulation
meandering; snaking; zigzagging
orbit; trajectory; (railroad) track; (right) track; proper course
to be blown off; to blow off; to blow away; to vanish; to disappear; to be dispelled
being very forgetful; having a bad memory
to see (someone) off; to escort; to watch (someone or something) go out of sight; to follow with one's eyes; to let (a bus, pitch, etc.) go by; to let pass; to postpone
reckless; thoughtless; rash; ill-advised; impulsive; mad (e.g. scheme)
to cross over; to cross; to pass through; to exceed; to surpass; to be more (than)
indescribable; having no way to express
move; movement; movement (of data); transfer; (data) migration
to see through; to see into (someone's heart, mind, etc.); to perceive; to find out; to detect
how; in what way; how (much); to what extent; however (much); no matter how
Shangri La (from Lost Horizon, 1933 novel by James Hilton); Shangri-La
frontier (esp. the American frontier); frontier (of a field); forefront (of science, technology)
feedback (on a product, person's performance, etc.); feedback (in an electronic circuit, biological system, etc.)
being based on; following (a rule, guidelines, etc.); conforming to (standards, regulations, etc.); complying with
majority; more than half; most (of); mostly; largely; mainly
dropping out; falling behind; omission; being left out; falling off; coming off
to bring (news, knowledge, etc.); to introduce; to bring about; to cause; to produce (e.g. results)
sense; sensation; feeling; intuition
strength; intensity; strong (e.g. glasses); powerful (e.g. lens); intense (e.g. fear)
that is (to say); namely; precisely; exactly; if one does ..., then; in that case
even; (if) only; just; besides; on top of that
to bear; to stand; to support; to withstand; to be fit for; to be equal to
computer; cyberbrain; digital brain