betterment; improvement; kaizen (Japanese business philosophy of continuous improvement)
demand; firm request; requisition; requirement; desire
boo! (sound used to scare someone); ugh (dissatisfaction, aggravation); ulp (consternation)
throwing in; inserting; investment; commitment (of funds, personnel, etc.); launching (a product into the market); introduction
gas; vapour; vapor; gaseous body
to be careful; to pay attention; to take care
science (inc. mathematics, medicine, etc.); natural science; science department (university); science course; science (as a school subject)
feeling refreshed; feeling relieved; neat; tidy; frank; open-hearted; completely
national language; Japanese language (often as a school subject in Japan); native Japanese words (as opposed to loanwords)
right or wrong; good or bad; quality; having both merits and demerits; having both advantages and disadvantages
complex; complicated; intricate; mixed (feelings)
expressing emotion; drawing facial expressions
sensible; clever; smart; decent; tasteful
word game; wordplay; playing with words
sentiment; emotions; one's feelings; one's heart
work; operation; manufacturing; fatigue duty
unnecessary; not needed; not necessary
and then; and so; and; so then
poisonous substance; toxic substance; poison
charge; custody; safekeeping; deposit; storage
cartoon; comic; comic strip; manga
as usual; as always; as before; as ever; still
warm (treatment, reception, etc.); kind; cordial; hospitable; courteous; respectful
aid; assistance; help; cheering; rooting (for); support
strong point; merit; virtue; advantage
to grow long (e.g. hair, nails); to lengthen; to extend; to reach out; to hold out; to straighten; to smooth out
as one would expect; just as you'd expect (from); still; all the same; even ... (e.g. "even a genius")
at once; immediately; without delay; promptly
medicine; pharmaceuticals; efficacious chemical (gunpowder, pesticide, etc.); (pottery) glaze; (illegal) drug; narcotic
stimulation (e.g. of an economy); revitalization (e.g. of a town); rejuvenation; activation
liquidity (esp. financial); fluidity; mobility (social, job, etc.)
crevice; crack; spare moment; interval; chink (in one's armor, armour); unpreparedness
to go into; to come into; to penetrate; to become complicated
possible; potential; practicable; feasible
to lose sight of (one's companions); to stray from; to miss (one's chance to ...)
strength; power; proficiency; ability
to surpass; to outstrip; to excel
honest to a fault; foolishly honest; naively honest