participation; joining; entry; adherence
emptiness; hollowness; vacancy; inanity; pointlessness; meaninglessness
artificial intelligence; AI
integration; unification; unity; combination; consolidation; synthesis
increase in sophistication; enhancement of functionality; increase in speed; upgrading
comprehensive; composite; all-embracing
difficulty; hardship; trouble; infeasibility; inability (to carry out)
development; exploitation
middle period; medium-term
to make (the best) use of; to put to good use; to let live; to keep alive; to revive; to resuscitate
to stand, walk, etc. shoulder-to-shoulder; to be on a par with
to cause; to induce; to bring about a result or state; to produce
character building; formation of character; personality development
period; time; opportunity; chance; age; term (e.g. in office); session (e.g. of parliament)
load; heavy burden; encumbrance; heavy freight; heavy responsibility
inside; within; while (e.g. one is young); during; among; amongst; in (secret, chaos, poverty, etc.)
to affix; to append; to entrust; to refer; to follow (the leader); to submit (a document, etc.)
deployment; disposition; posting; stationing
(unlikely event of) emergency; the worst(-case scenario); (lit.) 10000 to 1; (if) by some chance; by some possibility; in the unlikely event that
in preparation (for); in case (of); in the lead-up (to)
strict; severe; stringent; rigorous; rigid; firm
prohibition; inhibition; ban
permission; approval; authorization; to permit; to authorize
purple; violet; Lithospermum erythrorhizon (species of gromwell); type of soy sauce
to sleep (lying down); to go to bed; to lie in bed; to lie down; to sleep (with someone, i.e. have intercourse); to lie flat (e.g. of hair); to lie idle (of funds, stock, etc.)
flute; fife; pipe; whistle
locality; local area; limited area
to protect; to guard; to defend; to keep (i.e. a promise); to abide (by the rules); to observe
autonomy (philosophy); self-control
one class; one set; a pair; a suite; a series
unit; denomination; credit (in school); in units of (e.g. "in thousands"); in amounts of
versatility; multiplicity of use
fall; decline; lowering; deterioration; degradation
instead; but (on the other hand)
big; large; drastic; full-width cloth (approx. 72 cm wide for traditional Japanese clothing; approx. 140 cm wide for Western clothing)