space (between); gap; period of time (during, while); duration; between (two parties or things); among (a group); relations (between)
everyone; anyone; no one; nobody
to open; to undo; to bloom; to unfold; to open (for business, e.g. in the morning); to be wide (gap, etc.); to widen
(something) has never occurred; to have never done (something); such a thing has not happened; never happens; there is never a time when
secret; secrecy; mystery; secret (e.g. to success); esoteric teachings
to steal; to plagiarize; to steal (a technique, idea, etc.); to do stealthily; to do during scant time; to steal a base
danger; peril; hazard; risk
to approach; to draw near; to be imminent; to press (someone for something); to urge; to compel
riddle; puzzle; enigma; enigmatic; mysterious