oath; pledge; pact; covenant; alliance
lightly; easily; carelessly
scientific capability; scientific ability (e.g. of a student); scientific strength (e.g. of a country); level of technological development
secular life; workaday world
emptiness; being empty; not carrying anything; unburdened; dishonoured (bill, promise, etc.); false
self-protection; self-defence
unfavorable conditions; unfavourable conditions
agreement; concurrence; conformance; compliance
rotary wing (aircraft); rotor
system; lineage; corollary; system (range of strata that correspond to a particular time period); (taxonomical) series; -type
emergency landing; forced landing; crash landing
piece of junk; worn-out article; clumsy; useless; dismantled car; hitting (with fist)
image of an airplane (in the sky); sight of an airplane; shadow of an airplane
rotorcraft; rotary-wing aircraft
dynamic lift; lifting power
stall; downturn; slowdown; slump
royal capital; imperial capital
to be dizzy; to be disoriented; to be dazzled; to be lost in (greed, lust, etc.)
River Thames (UK); Thames River (Canada)
artery; arterial road; major route
running parallel (to); running side-by-side; keeping pace (with)
to succeed; to bear fruit
backlight (in photography, etc.); illumination (of the subject) from behind
180 degrees; complete (about-face; in policy, opinion, etc.); radical (change); hundred-and-eighty degree (turn)
echo; reverberation; spirit of a tree; tree spirit
the earth below; the ground below; this world (as opposed to heaven)
to swell up; to bulge; to swell (of a budget, population, etc.); to increase significantly; to balloon
Charing Cross tube station
on the way home from work; returning from work
office worker; salaried worker; white-collar worker
along the river; riverside
fortunately; luckily; thankfully
changing course (of a ship or aircraft); turning
abstruse; occult; mysterious
sleeve (esp. of a kimono); pocket of sleeve; vicinity (esp. of a bridge); approach; foot of a mountain; base of a mountain