(time of) one's childhood; when one was a child
lively; vigorous; energetic; full of (energy, appetite, curiosity, etc.); brimming with
worried look; concerned expression
relationship of mutual trust; fiduciary relation
crow (Corvus spp.); raven
dolphin (or other small toothed whales, incl. porpoises, belugas, etc.)
to measure; to weigh; to survey; to conjecture; to infer; to surmise
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.)
post horse; mounted courier; express messenger on horseback; fast horse; swift horse
falling far short (of); being far behind; being far inferior (to); being no match (for)
mountain chain; mountains
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
to pin (someone) down; to hold down; to shut out (one's opponent); to keep (the opposing team) from scoring; to suppress; to control
introduction; bringing in; installation; introduction (to a story, lecture, etc.); introductory part
flexible; lithe; soft; calisthenics
encryption; encoding; encipherment
unskillful; childish; immature; naive; artless; clumsy
communication technology; communications technology
drone; unmanned aircraft; drone
loss of eyesight; loss of sight; going blind; blindness
classified document; confidential document
idea; plan; fancy; impulse; thought; whim
raptor; bird of prey; predatory bird
plan; device; idea; design; contrivance; conception
fresh (e.g. fish); lively; spirited; animated
main constituent; core; nucleus; subject
lodging (house); accommodation; hotel; housing (for government employees)
to keep (something) a secret; to keep hidden (forever); to continue to conceal