whether or not (in phrases like "I don't know whether or not I can come")
fork; junction; parting of the ways; turning point
painful; difficult; distressing; (psychologically) difficult; straitened (circumstances); tight (financial situation)
to exchange; to swap; to barter; to replace; to substitute
sky; the air; weather; far-off place; distant place; state of mind; feeling
Herculean task; next-to-impossible undertaking
strict; close; precise; scrupulous
to take something into ...; to bring in; to lodge (a complaint); to file (a plan); to bring to (a state: tied game, vote, trial, etc.)
to distance oneself (from); to keep (something or someone) at a distance; to maintain a distance (from)
in a hurry; hastily; in feverish haste
to become muddy; to become cloudy; to become dull (of a sound, color, etc.); to become hoarse; to become impure (of a heart, society, etc.); to be corrupted
aviation; flight; flying; to fly; to take a flight
leaving behind; desertion; abandonment
empty; void; vain; fruitless; lifeless
on one hand; on the other hand
in perfect form; going swimmingly
somewhat larger (amount); quite a lot; a little more (than usual); a little extra
to compete with; to argue with; to quarrel
cry (esp. animal); roar; chirp; tweet; bark; whine
to synchronise the breathing with the opponent prior to the start of a match
waves that remain after the wind has subsided; after-effect; aftermath
anywhere; for all time; through thick and thin; come hell or high water; persistently; stubbornly
to puzzle over; to think deeply about; to rack one's brains over (wrack)
deliberately; intentionally; on purpose; purposely
complete; whole; perfect; safe
rank; ranking order; hierarchy
to content oneself with; to be resigned to (one's fate); to be contented (satisfied) with (one's lot)
to interfere (with); to hinder; to be hindered (from doing); to become impeded; to have difficulty; to suffer inconvenience
for a moment; for a minute; for a while; for some time; for the time being; for now
crevice; crack; spare moment; interval; chink (in one's armor, armour); unpreparedness
infant; baby; little child
beginning; start; outset; at first; at the beginning; initially
independently; individually; separately; alone; singlehanded; unassisted
the more I think about it; the more one thinks about it
to understand; to be convinced; to be satisfied
conspiracy; collusion; complicity
natural; understandable; reasonable; no wonder
fair and square; open and aboveboard