to notify; to advise; to inform
high alert; a state of high alert; on alert
supervised; under surveillance
difficult to ...; hard to ...
engine; agency; organisation; system; facility
unclear; obscure; unknown; unidentified; ignorance; lack of wisdom
serious; severe; grave; acute
to wriggle; to squirm; to crawl like a worm
guidance; leading; induction; introduction; incitement; inducement
mountain's surface; bare surface of a mountain
to be erected; to be built
corner; section; one horn; narwhal (Monodon monoceros)
to follow (road); to pursue (course); to follow up; to follow (hyperlink)
to investigate; to examine
perception; intuition; the sixth sense
not necessarily so; is not always true
to strengthen; to emphasize; to emphasise
there; over there; genitals; private parts; that far; that much
stronghold; inner citadel; base; headquarters
to add (one thing to another); to add (a few more words, an explanation, etc.)
mountain; hill; mine (e.g. coal mine); heap; pile; crown (of a hat); thread (of a screw)
foot (of a mountain or hill); bottom; base
to change completely; to switch (to); to shift (to another mode)
in front of one's eyes; just nearby; within a stone's throw
to puzzle over; to think deeply about; to rack one's brains over (wrack)
reflection; reverberation; reflex; reflexes
outside one's jurisdiction
to cross over; to cross; to pass through; to exceed; to surpass; to be more (than)
isolation; cut off; blockade; quarantine; interception; deprivation
weak point; unskillfulness
trivial; insignificant; meager; meagre; that little amount; such a small extent
to happen to have on hand or in stock
class (of students); group (of people); party; lot; bunch; crime family; organized-crime syndicate
doing something separately (from the group); going off on one's own
a-ha-ha (laughing loudly)
father; dad; husband; you; he