optional; voluntary; arbitrary; arbitrary
et cetera; etc.; and the like; and so forth
to cover; to hide; to conceal; to wrap; to disguise
these guys; these fellows
as is; as it is; as things are; like this; this way; at this rate
to sense; to perceive; to understand; to comprehend; to attain enlightenment
missing (of a person); lost; unaccounted for; whereabouts unknown
to leave (behind); to leave (undone); to not finish; to save; to set aside; to leave (to someone, esp. after one's death)
evaporation; disappearance (of a person); vanishing without a trace
married couple; husband and wife; man and wife
to take into one's possession; to receive; to take into one's care (e.g. person, pet); to take custody of; to leave; to go away
disappearance; running away; going missing; absconding
telephone call; phone call; telephone (device); phone
to leave (a matter, decision, etc. to someone); to entrust (to someone); to leave (to chance, one's imagination, etc.); to let (take its own course); to use (money, strength, spare time, etc.) to the full; to use freely
to be raised (e.g. child); to be brought up; to grow (up)
to cause trouble (for someone); to annoy; to bother; to inconvenience
to become known; to come to light; to be known; to be understood; to clearly not amount to much; to be insignificant
bad; wrong; must not (do, be); should not; useless; no good; hopeless
before I knew it; next thing you know; when I came to; all of a sudden
cold (to the touch); chilly; icy; (emotionally) cold; coldhearted; unfeeling
ground; earth's surface; land; lot; plot
rugged; scraggy; angular; gnarled
to enclose (with); to surround (with); to turn (one's head, heel, etc.); to rotate; to think over; to consider
pitch-dark; pitch-black; completely dark; very bleak (future); utterly hopeless
deep (hole, forest, snow, etc.); dense (e.g. fog); thick (e.g. weeds, woods); close (e.g. relationship); deep (involvement); intense (e.g. longing, flavor); severe
to shut; to close; to block (a street, entrance, etc.); to shut in (with snow, ice, etc.); to shut off; to consume (with negative feelings)
opening (a new store, golf course, runway, etc.); open; frank; open (car, collar, tournament, etc.)
securing; obtaining; ensuring; belay; belaying
development; evolution; expansion; spreading out; expansion (of an algebraic expression); development (of a three-dimensional shape); extraction (of compressed data)
nothing; naught; nought; un-; non-
individuality; personality; quirk; idiosyncrasy; character; individual characteristic
to move; to shift; to inspire; to rouse; to change; to alter; to operate
to feel around for; to fumble for; to investigate; to probe into; to explore (parts unknown); to enjoy (natural beauty)
(made of) leather; leather-bound
feeling in the hands (when striking, poking, etc.); (feeling of) resistance; response (to one's efforts); reaction; (having an) effect (on)
to pour into; to wash down (food); to insert (e.g. into a data stream); to integrate
explanation; commentary; exposition; elucidation
operating together; working together; being linked (to); being tied (to); being connected (with); interlocking
indeed; really; very; extremely; absolutely; certainly
to have a feeling (that); to have a sensation (that)