filtration; filtering; percolation
consideration; taking into account
nonexistent; not being (there); not having; not
muddy water; red-light district
diligently; assiduously; industriously; beavering away
need; want; necessity; expenses; cost
to begin to write; to start writing; to write out (e.g. on a blackboard); to extract (and write down); to write down (the important parts); to export
to say enough (as much as required); to say plenty; to say well; to say cleverly; to say often; to say frequently
youthful; young; young-looking
loss and gain; advantage and disadvantage
any and every thing; altogether; lock, stock, and barrel; the whole shooting match; the whole kit and caboodle; without reserve
to use as a pretext; to use as an excuse
to approach; to draw near; to gather (in one place); to come together; to stop by (while on one's way to another place); to drop by; to grow old
safety; security; safely; without incident; good health; inaction
news; word; tidings; omen
unearthly; otherworldly; out of this world; ethereal
it doesn't matter what; anything is fine
to obey respectfully; to humble oneself; to sit straight (upright, respectfully, attentively)
sticking to; clinging to; adhesion; cohesion; agglutination
to be broken; to break; to fall through; to come to nothing
(turning) round and round; in circles; wrapping around; winding around
riskiness; (level of) danger
lighthouse; old-fashioned interior light fixture comprising a wooden pole with an oil-filled dish and a wick atop it
essence; quintessence; spirit; soul; heart; pith
to cling to; to depend on; to embrace; to hug
one by one; one after another; successively
indication; denotation; designation; instructions; directions
to let fly; to make fly; to skip over; to leave out; to run fast; to drive fast; to spray
each time it happens; at all such times
to roll; to tumble; to fall over; to roll over; to lie down; to be scattered about; to be lying around
to roll up; to enfold; to swallow up; to involve; to drag into
extempore; impromptu; improvised; ad-lib; off-the-cuff; instant
condition of fire; heat level; fire strength
(ethyl) alcohol; spirits of wine
separation; deposition; precipitation
frivolous; flippant; superficial; shallow; trifling; insincere
steady; honest; sober; straightforward