average; mean; balance; equilibrium
textbook; coursebook; schoolbook
pyramid; monumental work; landmark achievement
to say in other words; to put another way; to express in different words; to reword; to rephrase
at once; immediately; right now
accurate; correct; precise; exact
original proposer; originator; proponent; initiator
unification; bringing together; generalization; control; supervision
person; -er; (arch.) expert; (arch.) geisha; (arch.) prostitute
person in charge (including a supervisory role for other staff); person responsible for ...; responsible party; supervisor; manager
ringleader; mastermind; leader (of a plot)
high and low; rise and fall
youth; child (esp. of the young son of someone of high social standing); young; new
to play dumb; to feign ignorance; to act as innocent
earning extra money (e.g. from a side job)
a little; a bit; just a minute; for a moment; somewhat; rather; (not) easily
free (of charge); gratuitous
program (of events, music, etc.); programme; program (booklet); brochure; (computer) program; programming
being well versed (in); being well acquainted (with); being familiar (with); (a boy's) first ejaculation; spermarche; semenarche
rather; better; instead; if anything
tool; implement; means; furniture
convenient; handy; useful
unnecessary; not needed; not necessary
around there; near there; or thereabouts; or so; such a matter; such a thing
study; diligence; discount; reduction
progress; advance; improvement; development
remarkable; striking; brilliant; splendid; spectacular; wonderful
long ago; previous; of a former age
special; particular; extraordinary; exceptional; especial
special; particular; peculiar; unique
machine parts; machinery; equipment
way to use something; treatment; management (of help)
even; (if) only; just; besides; on top of that
to memorize; to memorise; to learn; to pick up; to feel; to think
easy; simple; informal; offhand; cheap
to cross (legs or arms); to link (arms); to put together; to construct; to braid; to plait; to grapple
occupation; calling; livelihood
when it comes to ...; where ... is concerned; if it's the case that ...; if it turns out that ...; if it's true that ...
that's a different matter; that's a different story
a little; some; somewhat; amount; quantity; number