to dive (into or under water); to get under; to get into; to hide oneself (esp. from the government); to conceal oneself
playful; mischievous; joker; prankster; scamp
indication; expression; display; displaying; representation; (copyright) attribution
contrived; false-sounding
beautiful face; beautiful looks; beauty; belle; handsome man
soldier; combatant; warrior
old-fashioned; behind the times; out-of-date; antiquated
1,000,000; one million; million; many
signal; signalling; signaling; traffic light; traffic signal
century; era; of the century (e.g. fight of the century)
practical; useful; utilitarian; pragmatic
letterpress printing; movable-type printing
invention; intelligent; clever; smart
to continue; to last; to continue (without a break); to be unbroken; to occur again and again; to lead to; to connect to
making rapid progress; making great advances; rush; dash; onslaught
there's no (other) way; cannot be helped; unavoidable; it's no use (doing); pointless; hopeless (person)
optimization; optimisation
one's own discretion (idea, responsibility)
to shake; to tremble; to sway; to be unsettled; to be unstable; to fluctuate
trend of the times; way things are going
appeal; call for something; request; axiom
Second World War (1939-1945); World War II; WWII; WW2
after all; in the end; conclusion; end; end of a game of go, shogi, etc.
in short; the point is; the important thing is; in a word; basically
most difficult; next to impossible
spot; point; place; position
vigorously ...; suddenly ...
absurd; unreasonable; extreme; senseless; disorderly; chaotic
most suitable; optimum; optimal; best
engaging in (work); pursuing (e.g. studies); following (a profession); being involved in
monkey (esp. the Japanese macaque, Macaca fuscata); ape; sly person; idiot; hick; sliding wooden bolt (for holding a door or window shut); clasp used to control the height of a pot-hook