to ring; to sound; to be popular; to be esteemed; to state; to insist
everyone; anyone; no one; nobody
key; lock; key (to a problem); clue
to open; to undo; to bloom; to unfold; to open (for business, e.g. in the morning); to be wide (gap, etc.); to widen
central dogma (of molecular biology)
opening (a door, window, etc.); leaving open; opening up (e.g. to the public); allowing (public) access
scary; frightening; eerie; dreadful
coolness; calmness; composure; all right; fine; OK
dangerous; risky; in danger; in jeopardy; uncertain; unreliable
to go through; to suffer; to experience (something unpleasant)
to kill; to slay; to suppress; to block; to suppress (a voice, feelings, etc.); to hold back
may; might; perhaps; may be; possibly
to become known; to come to light; to be known; to be understood; to clearly not amount to much; to be insignificant
yes; yeah; hum; hmmm; oof
smallness; small item; short month (i.e. having fewer than 31 days); elementary school; smaller (of two things, places, etc. with the same name); inferior; younger (of two people with the same name)
original; primitive; primary; fundamental; raw
invasion; incursion; raid; aggression; intrusion; trespass
unidentified flying object; UFO
exchanging parts or equipment to effect a change in performance
common reed (Phragmites australis)
sky; the skies; high-altitude sky; upper air
energy; energy; strength; energy source; energy resource; food energy
barely; narrowly; only just; with difficulty
important points; main points
tearing up and discarding (e.g. documents); disposal (e.g. weaponry); annulment; cancellation; reversal (of an original ruling)
preference; priority; precedence
disappearance; vanishing; loss; dying away; wearing off
situation; (present) state of affairs; circumstances
cannot be helped; unavoidable
ignition; lighting; firing; setting off
attack; assault; raid; criticism; censure; denunciation
relief squad; rescue party
standing by; awaiting an opportunity; being on alert