very hard; with utmost effort; as hard as one can; with all one's might; for dear life; eagerly
signal; signalling; signaling; traffic light; traffic signal
unexpected; unforeseen; strange
incident; affair; happening; event
national defence forces; national security forces
base (military, expedition, etc.)
to notice; to recognize; to recognise; to become aware of; to perceive; to realize
aeroplane; airplane; aircraft
understanding; comprehension; appreciation; sympathy
to give birth; to bear (child); to lay (eggs); to produce; to yield; to give rise to
reality; actuality; hard fact
sharp turn; tight turn; steep turn
to hide; to conceal oneself
not less than; ... and over; beyond (e.g. one's expectations); above; above-mentioned; aforementioned
plural; multiple; several
neutralization; neutralisation; counteraction
to run out of; to dry up; to be depleted; to hit the bottom; to bottom out
selection; making a choice; sifting; decision to adopt or reject
result; consequence; coming to fruition; bearing fruit; as a result; consequently
zero; 0; nought; nothing; zilch
near; close; close (in time); soon; close (relationship); friendly
to abate; to weaken; to be emaciated; to be dejected; to be perplexed
revolution; rotation; turning; turning (an aircraft or ship)
to obey (an order, law, etc.); to abide by (a rule, custom, etc.); to follow (a person); to accompany; to go alongside (e.g. a river); to follow (e.g. a sign)
to lose hope; to be plunged into darkness
tailspin; spin; drilling; boring
to fall down; to drop; to be omitted; to be missing; to decrease; to sink; to fail (e.g. exam or class)
bumping of heads; running into; coming across; encountering
disappearance; vanishing; loss; dying away; wearing off
formation (e.g. of aircraft)
to fly away; to flee away; to scatter