strict; severe; stringent; rigorous; rigid; firm
shutting tightly; making airtight; sealing hermetically
opening (a door, window, etc.); leaving open; opening up (e.g. to the public); allowing (public) access
irritant odor; irritant odour; irritating smell (odor, odour)
memory; sense; experience
precious; valuable; priceless; noble; exalted; sacred
the minute (that) ...; no sooner than ...; as soon as; whether or not
to slip through (a crowd); to weave through (e.g. traffic); to pass through; to get around; to elude (e.g. the law); to evade
leaving someone behind; abandoning someone; marooning someone
absentmindedness; preoccupation; setting one's mind at ease; ceasing to worry; (arch.) loss of one's moral sense; (arch.) straying from virtue
mucus; mucilage; viscous liquid; phlegm
unpleasant; revolting; feeling sick; feeling unwell; uncomfortable; annoying
large drop (of rain, sweat, tears, etc.); large grain-like object (e.g. grape, cherry)
dripping; trickling; wet and heavy (snow, clay, etc.); (arch.) (moving) slowly
heroic; fierce; grand; sublime; magnificent
deep blue; bright blue; ghastly pale; pallid; white as a sheet
meat eating; eating of meat; meat diet; carnivorous
tear; tears; lachrymal secretion; sympathy
to chase about; to hang on; to drive hard
atrocious; heinous; fiendish; brutal; vicious
(many) trees; every tree; all kinds of trees
everywhere; all over; throughout
dozens; scores of; decades
consists of; comprises; is made up of
nest; rookery; den; haunt; (spider's) web
overfishing; overhunting; indiscriminate fishing; indiscriminate hunting
ancient times; prehistoric times; the distant past; a very long time ago
hardly any; almost nonexistent; very little
my; one's own; I ...; one ...
specialization; specialisation
decline; degeneration; decay; waning; ebbing
to investigate thoroughly; to examine closely; to probe into; to be obsessed with a thought; to brood over; to worry about
stone (of a fruit); pit; core (of an organization, team, etc.); nucleus; nuclear weapons; nucleus (of an atom); nucleus (of a cell)
reduction; curtailment; cut; cutback; scaling down; contraction
ancestor; forefather; foremother
rising rapidly (e.g. prices, popularity); soaring; skyrocketing; going through the roof