once; before; formerly; never yet; never before; first time
number; edition; sobriquet; pen-name; size (of printing types, canvases, knitting needles, etc.); suffix attached to names of ships, trains, airplanes, etc.
book; volume; this; present; main; head
complete works; complete collection; complete series
included (in a publication); carried; printed
reference; bibliographical reference; consultation; browsing (e.g. when selecting a file to upload on a computer); checking out
number theory; Samkhya (school of Indian philosophy)
ideal; ideal in a ring (i.e. subset of a ring closed under addition and multiplication by elements of the ambient ring)
mainly; chiefly; primarily; for the most part
rice bowl; tea cup; teacup
inside; within; while (e.g. one is young); during; among; amongst; in (secret, chaos, poverty, etc.)
having a single meaning; allowing only one interpretation; unequivocal; principal; primary; most important
obvious; clear; plain; evident; apparent; explicit
porcelain bowl; donburi; bowl of meat, fish, etc. served over rice
mostly; nearly; practically; well-nigh; almost invariably; all but
present age; present day; today; modern era; modern times
to appear; to come in sight; to become visible; to be expressed (e.g. emotions); to become apparent (e.g. trends, effects)
(social) class; rank; grade
implementation (e.g. of a system); materialization; materialisation; realization; realisation; actualization
which (of three or more); well; now; c'mon
technical (e.g. discussion); exclusive; professional
study; research; investigation
nature (of a person); sex; gender; sex (i.e. sexual attraction, activity, etc.); gender; -ty
how; in what way; how about; questionable
achievement; performance; results; work; contribution
good; excellent; sufficient; enough; profitable (deal, business offer, etc.); beneficial
popularization; popularisation
diffusion; spread; popularization; promulgation; familiarization
amateur; layman; respectable woman (i.e. not a prostitute, hostess, geisha); (arch.) unlicensed prostitute