underground; below the ground; world of the dead; the grave; underground (activities, movement, etc.); secret
personal identification number; PIN; password number
to use (a thing, method, etc.); to make use of; to use (a person, animal, puppet, etc.); to employ; to use (time, money, etc.); to spend
numeral; figure; digit; numeric character
variety; kind; type; counter for kinds, species, etc.
as one would expect; just as you'd expect (from); still; all the same; even ... (e.g. "even a genius")
loveable; very likeable; like very much
second (unit of time); arc second
certain; sure; doubtless; I have no doubt; You can depend on it; It's a safe bet
there; over there; genitals; private parts; that far; that much