study; research; investigation
insufficiency; deficiency; shortage; dissatisfaction; discontent; complaint
crow (Corvus spp.); raven
common chimpanzee (Pan troglodytes); chimpanzee; chimp
dolphin (or other small toothed whales, such as porpoises, belugas, etc.)
to measure; to weigh; to survey; to conjecture; to infer; to surmise
to hit; to strike; to strike (noon, etc.); to sound (cymbals, etc.); to beat (rhythmically, e.g. pulse, waves, etc.); to move; to impress
to make a fist; to clench one's fist
delivering an order; dispatch of an order; messenger; orderly; runner
difficult to ...; hard to ...
carrier pigeon; homing pigeon
precipitous; rugged; inaccessible; grim; severe; stern
to hold out; to extend (e.g. one's hands); to thrust (javelin); to offer (e.g. aid, help, etc.)
falling far short (of); being far behind; being far inferior (to); being no match (for)
to cross over; to cross; to pass through; to exceed; to surpass; to be more (than)
training; practice; discipline; ascetic practices
to pile up; to stack; to load (car, ship, etc.); to pack; to acquire; to accumulate
document; writing; letter; document addressed to someone
secrecy; highly classified information
to fall into someone's hands; to pass into another's possession
uninterested; unconcerned; plain; light; flowing gently
purpose; goal; aim; objective; intention
to shut out one's opponents; to stop the other side from scoring
great hurry; great haste; rush
introduction; bringing in; leading in; installation
flexible; lithe; soft; pliable
ruler; monarch; sovereign
encryption; encipherment; password protection
unskillful; childish; immature; naive; artless; clumsy
from time immemorial; ancient; time-honoured; time-honored
communication technology; communications technology
drone; unmanned aircraft; drone
measure; step; countermeasure; counterplan; countermove; strategy
equipment; device; installation; stage setting
laser; Light Amplification by Stimulated Emission of Radiation
loss of eyesight; loss of vision; going blind; blindness
fall; crash (e.g. aircraft)
classified document; confidential document
idea; plan; fancy; impulse; thought; whim