proving ground; test site
collecting; accumulating; collection (of art, stamps, insects, etc.); garbage collection; waste collection
factory; plant; mill; workshop
lie; falsehood; fiction; fabrication
based on; built on; made from
one of these days; someday; one day
region of the heart; central part; heart (e.g. of a city); center
depths; deep place; bottom (of one's heart)
smell; scent; aura; whiff; faint, mist-like pattern along the temper line of a Japanese sword
inadequacy; inappropriateness; unfitness; impropriety
to crumble away; to collapse
reproduction; duplication; reprinting
to form a line; to queue up; to line up
to avoid meeting someone's gaze; to not look someone in the eyes
to cock one's head in puzzlement; to tilt one's head in contemplation; to wrack one's brain; to think hard
to get tired out; to be exhausted
to love; to be attached to; to cherish; to caress
inconsistency; discord; conflict; discrepancy; contradiction; failure
what number (in a sequence); what rank
honest; frank; candid; honestly; frankly
the nth ...; divisions of a kabuki performance
tightly (hold, squeeze, etc.); firmly; forcefully (e.g. push); hard
twenty years of age; youth; early age; tender age of ...
diligent application (to work or study); cultivating one's character by studying hard; mutual encouragement (to improve); working hard together; friendly rivalry
by chance; by accident; accidentally; occasionally; once in a while; now and then
signal; signalling; signaling; traffic light; traffic signal
(just) out of curiosity; (just) in order to satisfy one's curiosity; aimed chiefly at amusing; sensational (e.g. magazine)
person standing watch; guard duty
to connect; to join; to join or tie or knot together
laboratory testing bench; laboratory table; subject of an experiment; (human) guinea pig
great joy; delight; jubilation
the very start; the very beginning
inverted; upside down; reversed; back to front; wrong way round
solution; solution strategy
coma; deep sleep; falling fast asleep
to be able to do; to be capable of doing