to tinker with; to fumble with; to fiddle with; to twiddle
sleeplessness; insomnia; wakefulness
sneakily; secretly; stealthily; on the sly
supervision; control; superintendence; director; superintendent; supervisor
poor-quality; low-quality; shoddy; low-grade
having a headache; racking one's brains; troubling over something
re-education; retraining; in-service training
desktop (computer); home (game console, CD player, etc.); non-portable; stationary
flow of electric current; supply of power; turning on electricity; applying electric current; passing an electric current (through)
sound sleep; good sleep; quiet sleep
to mediate; to intervene; to smooth
thief; burglar; robber; theft; burglary; robbery
idiot; moron; stupid; foolish; trivial; insignificant; malfunctioning
deferment (e.g. of savings); leaving (something) as it stands; unredeemed; unredeemable; irredeemable
sudden and unexpected; coming out of nowhere; out of the blue
(stroke of) luck; (unexpected) good fortune; godsend; windfall
guardian; protector; patron; parent
tuck (e.g. in a dress); rise (e.g. in price)
user guide; how to operate; operation procedures
game; pastime; recreation; diversion
to be completely absorbed in; to fall for (something)
gotcha; alrighty; got it; OK
doubles (tennis, badminton, etc.)
yellow; high-pitched (voice); shrill
equal match; good match; fair match; equal in ability; being a worthy rival
rare; strange; odd; peculiar
method of operation; operating procedure
serve; serving (e.g. of food)
ball not bouncing (e.g. in a catch)
one bounce (of a ball); one-hopper
exchange of blows; long rally
gloomy; dismal; miserable; spirit of yin
consecutive victories; series of victories; winning streak
to hit each other; to exchange blows; to fight
if you do this; if this is the case
alternately; by turns; in turn; one after the other