frontier (esp. the American frontier); frontier (of a field); forefront (of science, technology)
observation; survey; measurement; opinion; prediction; thinking
matter of time; question of time
to yearn for; to long for; to follow (someone); to idolize (for virtue, learning, status, etc.)
death penalty; capital punishment
to amass; to accumulate; to store; to leave unpaid
field of vision; view; one's outlook (e.g. on life); one's horizons
emergency; extreme; great; extraordinary
to be imaginable; to be conceivable
changing again and again; seesawing back and forth; being in a state of flux
to turn; to shift; to switch; to change; to alter
to worry (about); to be worried (about); to be troubled (by); to be pained (by); to be distressed (by)
efforts; exertion; endeavour; assistance; services
exactly the opposite (of); completely opposite; quite contrary
to watch steadily; to stare
splendid; fine; handsome; elegant; imposing; prominent
quick; speedy; prompt; rapid; swift
to take into one's possession; to receive; to take into one's care (e.g. person, pet); to take custody of; to leave; to go away
thank you for the meal; that was a delicious meal; what a wonderful meal
apologies for the crude food
(playing a) game (of go, shogi, etc.)
to be dispelled (of doubts, ill feeling, etc.); to disappear; to be put behind one; to burst (of a boil, abscess, etc.)
one after another; in rapid succession; without reservation; without hesitation; tramping; stomping
locked-room murder (e.g. in murder mystery fiction)
normal operation (of a train service, bus service, etc.); running normally; normal state of affairs; business as usual
restarting (a machine, engine, project, etc.); resuming
repetition; repeat; replication; recursion; iteration
laboratory testing bench; laboratory table; subject of an experiment; (human) guinea pig
to step forward; to take a step forward; to start on a project, etc.; to take the first step with
self-analysis; autoanalysis
the following week; the next week
making (a report, plan, contract, etc.); drawing up; writing out; preparing; creating (a file, website, account, etc.)
meeting convened to discuss issues; planning conference; review meeting; feedback session; investigative commission
brow; forehead; prominent forehead; beetle brow; not catching anything
deviation; inclination; offset; polarization; polarisation
positioning side-by-side; parallel arrangement; going along with something; following the crowd; treating something in an equal or egalitarian manner
amplitude (of vibration); (degree of) instability; volatility; fluctuation
to groan; to moan; to roar; to howl; to hum (engine, wind, etc.); to buzz; to ooh and aah (in admiration)
visualization; rendering visible (e.g. a problem); digitization
low spirits; depression; dejection; discouragement; despondency