area; zone; district; quarter; section; limits
invasion; incursion; raid; aggression; intrusion; trespass
to stand watch; to stand guard; to look out; to open (one's eyes) wide
at; in; at; when; by; with
monitoring; watching; observation; surveillance; guarding; supervision
after (practically) no time; immediately after; just; having no time to
on the way; en route; in the middle of; midway; halfway
tearing up and discarding (e.g. documents); destruction; annulment; cancellation; reversal (of an original ruling on appeal); quashing
some; any; in any way; of some kind; of some sort
(in) the air; midair; sky
coincidentally; by chance; unexpectedly; rarely; unusually; seldom
airborne troops; paratroops
combat readiness; battle readiness; fighting trim
warning; caution; admonition; keikoku (penalty in judo)
synthesis (in semiconductor technology)
startup; booting up; activation; starting (e.g. engine, computer); launch
some; any; in any way; of some kind; of some sort
trace; vestige; mark; sign; evidence
effect; effectiveness; efficacy; effects (e.g. sound effects, visual effects, special effects)
short distance; close range
descent; fall; drop; passing down (of an order, decree, etc.)
under one's eyes; below one's eyes
blue; azure; green; pale (facial color); gray; unripe
under (guidance, supervision, rules, the law, etc.); under (a flag, the sun, etc.); beneath; with (e.g. one blow); on (the promise, condition, assumption, etc. that ...); (someone's) side
standing close together; bristling (with)
tall building; high-rise building
to disappear into; to be lost in; to do something under the cover of (confusion, etc.); to be almost indistinguishable; to be confusingly similar; to be diverted from (negative emotions, etc.)
town; city; municipal; urban
ruins (of a building, town, etc.); remains
grave marker; gravestone; headstone; writing on a headstone (name, date of death, etc.)
multi-floor building; multi-storey building; tall building
very fast; in a twinkle; before one's eyes
operating together; working together; being linked (to); being tied (to); being connected (with); interlocking
sudden; abrupt; rapid; sharp; drastic; radical