to do completely; to do accidentally; to do without meaning to; to happen to do
aviation; flight; flying; to fly; to take a flight
aah!; ooh!; oh no!; oh boy!
principle; theory; fundamental truth
(sound of) laughter; laughing voice
high-speed; rapid; express; highway; freeway; expressway
to roll around laughing; to fold up; to hold one's sides with laughter
several people; some people; a few people; a number of people
foundation; base; basis; from the beginning; from the outset; by nature
friction; rubbing; chafing; discord; friction; strife
as a test; as an experiment; by way of experiment; by way of trial; tentatively
wind power; force (level on the Beaufort wind speed scale)
insistence; (major) emphasis; stress
spell; charm; incantation; magic word
to concede one is entirely in the wrong (for the sake of argument)
wing; Chinese "Wings" constellation (one of the 28 mansions); (arch.) counter for birds or bird wings
to put on airs; to assume importance
tightly; exactly; precisely; close-fitting (e.g. suit); firm (body); lean
to flap (wings); to spread one's wings; to go out into the world
difference; variation; difference
desktop; desk-top; tabletop; after-dinner speech
sleek; smooth; thin (of a liquid); without hesitation or delay
to rise to the surface; to come to the front; to emerge (e.g. from obscurity); to stand out (e.g. against a dark background)
strange; weird; odd; strange thing; strange person
incidentally; taking the opportunity; while (you) are at it; on the occasion
three times; thrice; third (musical interval); many times; over and over again
not serious; frivolous; insincere; unsteady
not feeling like doing ...; having no mind to ...; being in no mood for ...; having no intention of ...
out of the question; outrageous; impossible; irrelevant; not pertinent
potentiality; likelihood; possibility; availability
to be useful; to be helpful; to serve the purpose
no sooner than; as soon as; immediately after; at the thought of; when I think about
(somebody else's) parents; both parents
final warning; ultimatum; last notice
(some type of) enthusiast; somebody possessed of a (certain kind of) mental abnormality