deep; profound; complicated; advanced; impenetrable
collapse; break; cave-in; crash; (market) decline
to pull oneself together; to collect oneself (after a failure); to regain control (of oneself)
to choose at one's own discretion; to choose when to do something; to estimate (the time for something)
cave; cavern; den; grotto
guidance; leading (the way); information; notice; announcement (of one's arrival); invitation
heavy machinery; heavy equipment; heavy machine gun
I wonder about that; don't bet on it; famous last words
to spill; to drop; to grumble; to complain; to let one's feelings show
to confute; to argue down; to persuade; to convince; to prevail on
rock; boulder; crag; cliff; anchor
lightly; gaping wide; suddenly; unexpectedly
to drill; to bore; to hit the mark; to get to the heart of (the matter); (arch.) to put on; (arch.) to wear
footprints; record of page visitors (e.g. in social networking sites)
to dig; to excavate; to delve into; to dig up (e.g. vegetables); (for two men) to have anal sex
(real) ability; true strength; merit; arms; force
to remonstrate; to admonish (someone) for; to advise (someone) not to; to warn against
dissolution; dissolving; solution (e.g. chemical); melting; liquefying; fusion
to make; to produce; to prepare (food); to brew (alcohol); to raise; to grow; to till
retreating figure; appearance from behind
gas (state of matter, e.g. poison gas, natural gas); gasoline; gas; dense fog; thick fog; gas stove
within; inside of; less than
ingredient; component; composition
all-purpose; utility; universal; all-powerful; almighty; omnipotent
progress; pace; carriage; step; stage
precise; accurate; appropriate; exactly the right
to develop a relationship; to build intimacy; to deepen a friendship; to get acquainted
injury; wound; mistake; accident; loss
splint; brace; epithesis; splice; support (e.g. for a plant); prop
obstacle; hindrance; impediment; difficulty
to carry (a child) on one's back; to piggyback; (arch.) to take on (a job, responsibility, etc.)
look of amazement; looking dumbfounded
one must constantly be on one's guard with ...; one cannot be too careful of ...
ignoring; bypassing; doing something without consultation; going over someone's head
be considered; be deemed; be thought to be
to say enough (as much as required); to say plenty; to say well; to say cleverly; to say often; to say frequently
(musical) time; tempo; beat; the moment; the instance; chance