interval; period of time; among; between; good opportunity; chance
affinity; compatibility; chemistry (between people)
to take lessons in; to be taught; to learn (from a teacher); to study (under a teacher); to get training in
weak point; weakness; shortcoming; defect; flaw; sore spot
offset; offsetting each other; cancelling each other out; set-off; setoff
applying (e.g. a technology); adoption
to deny; to contradict; to negate (esp. a sound); to drown out
together; jointly; at the same time; with; both
disabling; invalidation; nullification; vitiation
conclusion; decision; end; settlement
ability; capacity; capability; physical strength
to ask a question; to ask questions
principle; general rule; as a rule; in principle; in general
control; management (e.g. of a business)
under (influence, control, conditions, etc. of); during (war, occupation, etc.)
use; application; employment; utilization; utilisation
restriction; restraint; limitation; limit
old; aged; long; since long ago; of the distant past; long-ago
(one's) whereabouts; destination; where one is headed; outcome; course (of events); future
to become known; to come to light; to be known; to be understood; to clearly not amount to much; to be insignificant
(not) always; (not) necessarily; (not) entirely; (not) all
not necessarily so; is not always true
present condition; existing state; status quo; current state
ability; performance; efficiency
scattered; disperse; loose; disconnected; in pieces; in drops
to surpass; to outstrip; to excel
small fraction; small proportion
competition; contest; rivalry; competition (between organisms or species)
to raise; to lift; to boost; to enhance
first come, first served; the early bird catches the worm
by all means; at all costs; absolutely
please (give me); please (do for me)
easily; readily; quickly; lightly (seasoned food, applied make-up, etc.); plainly; simply
originally; primarily; essentially; intrinsically; proper; rightful
to put one's life on the line; to risk one's life; to put everything one has into it
to challenge to (a fight, game, etc.); to throw down the gauntlet; to tackle (e.g. a problem); to attempt; to pressure (someone) for sex; to make advances to
frank; direct; plain; straightforward; point-blank; concise
den; haunt; hangout; nest; lair
living thing; organism; creature; biology
usual; ordinary; normal; regular; general; common
to prevent; to take precautions
periodic; regular; routine