iron grill; iron grille; iron lattice; prison
or something; for instance ... (though there are other suitable options); ... or ...; as soon as; right after; while still
riddle; puzzle; enigma; enigmatic; mysterious
to be tied together; to be connected to; to lead to; to be related to; to be related (by blood)
dimension; perspective; point of reference; level (of something)
detailed; full; minute; knowing very well; knowledgeable (about); well-acquainted (with)
it does not mean that ...; I don't mean that ...; it is not the case that
reverse; opposite; converse (of a hypothesis, etc.); inverse (function)
technical (e.g. discussion); exclusive; professional
to have a talk; to tell a story
to adjoin each other; to sit side by side
or rather (say); or better (say); or perhaps I should say; or, how should I put it; I mean
to be piled up; to lie on top of one another; to come one after another; to happen over and over; to overlap (each other); to occur at the same time
interval; space; valley; gorge; loophole (in a wall); crenel
at once; immediately; without delay; promptly
right; correct; proper; righteous; just
conclusive evidence; positive proof; definite proof; confirmation
for some reason or other; somehow or other; by some chance
suddenly; casually; accidentally; incidentally; unexpectedly; unintentionally
to disappear into; to slip into; to be lost in; to be mixed up with
mysterious disappearance; being spirited away
common sense; good sense; common knowledge; general knowledge; common practice; accepted practice
that's the way it is; such is life
coming and going; keeping in touch; visiting each other; street traffic; highway
to cause a loss; to make a hole (in)
hole; opening; pit; hollow; burrow; den; deficit
preface; introduction; preamble
not ... for nothing; not ... with nothing to show for it; worthwhile; no wonder ...
sensible; sensuous; intuitive
to catch; to capture; to grasp (e.g. meaning); to perceive; to captivate; to move (one's heart)
explanation; exposition; description; account; caption; legend
proof; testimony; demonstration; verification; certification
uncertain; vague; ambiguous
form; shape; figure; visage
vague; ambiguous; shady; disreputable; fuzzy
theory; reason; logic; (unreasonable) argument; strained logic; excuse
correspondence (to); equivalence; suitability; coordination; dealing with; coping with
to break; to destroy; to wreck; to ruin; to break (a bill, etc.)