essential; important; crucial; vital; main
being stuck between a rock and a hard place; being in a dilemma; being torn between conflicting demands
to yield; to give in; to bend (knee, etc.); to subdue; to overpower; (arch.) to feel down
it does not mean that ...; I don't mean that ...; it is not the case that...
fixed period; fixed term; regular; periodic; fixed-term commuter pass; fixed-term deposit
serious; severe; grave; acute
to be noteworthy; to be worthy of attention
edge (of a knife or sword); prong (of an electrical plug)
handicraft; industrial art object
imitation; fake; counterfeit; sham
knife thrower; knife throwing
to use; to make use of; to utilize; to utilise
to taper to a point; to become pointed; to become sharp; to look displeased; to look sour; to be on edge
origin; source; birthplace; release from prison; discharge from prison; exit
unclear; obscure; unknown; unidentified; ignorance; lack of wisdom
detection; sense (e.g. sensor)
as one would expect; just as you'd expect (from); still; all the same; even ... (e.g. "even a genius")
structure; construction; arrangement; plan; plot; contrivance
surface; appearances; exterior
to match (rhythm, speed, etc.); to join together; to unite; to face; to be opposite (someone); to compare; to check with
hidden room; secret chamber
to untie; to unfasten; to unsew; to unstitch; to solve; to work out; to dispel (misunderstanding, etc.)
to tear up and throw away
double; two-fold; diplo-; dipl-; double-edged eyelid; double eyelid
to lurk; to be hidden; to be concealed; to lie dormant; to be latent
to change places; to relieve one another; to replace someone
substitution; replacement; shifting; change
to be broken; to break; to fall through; to come to nothing
mechanism; mechanical parts; jack-in-the-box
skillfully; admirably; really well; excellently
rock (music); rock; boulder; on the rocks
to be disconnected; to get out of place; to miss the mark; to get it wrong (e.g. guess, expectation); to be removed; to be excluded
spring; spring (in one's legs); bounce; springboard; impetus
radio (communication); wireless; not using wires
trap door; removable floor boards
behind; in the rear; in back
to blow off; to be blown off
to boost; to force up; to push up