to dive (into or under water); to get under; to get into; to hide oneself (esp. from the government); to conceal oneself
plan; scheme; (payment) plan; package; deal
if (it) doesn't exist; if there is no ...; if not ...; unless ...; have to ...; must ...
(social) class; rank; grade
present condition; existing state; status quo; current state
three; three years of age
to play a leading role; to play a central part
rough (estimate, summary, etc.); broad; general; careless (e.g. work); sloppy; crude
to write down; to note down; to mention; to describe; to inscribe; to mark
nest; rookery; den; haunt; (spider's) web
imp; elf; pixie; goblin; devilkin
to settle (in a place); to settle down
stickiness; gumminess; sticky material; clay
Wednesday; shaved ice (served with flavored syrup); water (fifth of the five elements)
shadow; silhouette; reflection; image; ominous sign; light (stars, moon); trace
wolf (Canis lupus); wolf in sheep's clothing; womanizer
cave; cavern; grotto; dwelling made in a cave; house carved into rock
within; inside of; less than
one day; all day (long); the whole day; first day of the month
to divide; to separate; to partition; to punctuate; to mark off (with a comma); to insert pauses (between words or phrases when reading aloud)
to look displeased; to frown; to scowl; to look grave; to look serious
genuine; real; authentic; full-scale; full-blown; all-out
never mind!; don't worry about it
restriction; restraint; limitation; limit
once; one time; one round; one game; one bout; one heat
elementary level; beginner level
halfway; midway; partway; mid-course
to spend time (on doing something)
index finger; forefinger; first (occ. second) finger; second toe
previously; already; for some time; for quite a while
one (small animal); two-tan bolt of cloth
group; crowd; flock; herd; bevy; school
ecology; life and habits (of an animal); mode of life; way of living
to erase; to rub out; to turn off (a light, TV, heater, etc.); to switch off; to extinguish (a fire, candle, etc.); to put out; to remove (a smell, pain, etc.)
measure; step; countermeasure; counterplan; countermove; strategy
somehow (or other); for some reason; without knowing why; something (or other); some ... or other
obstacle; impediment; disability; handicap; steeplechase; obstacle race
consideration; examination; investigation; study; scrutiny; discussion
as soon as possible; ASAP; even a little early
current; urgent; to confront (an issue); to face (up to something); for the meantime; at present
stone (of a fruit); pit; core (of an organization, team, etc.); nucleus; nuclear weapons; nucleus (of an atom); nucleus (of a cell)