keychain; key chain; key ring (encryption)
for use by children; for children
untraceable; long lost; one's whereabouts being unknown
depressed; bummed out; down; heavy-hearted; heavy-spirited; feeling reluctant (to do)
main purpose; chief aim; focus; main point; gist; essence
organic; coordinated; working in a coordinated fashion
(school) subject; curriculum; course; item; heading; entry
time for battle; military secrets; strategy
last; final; closing; last train (bus, flight, etc.; of the day)
to be eye-popping; to be staggering; to be amazing
attentively; with great attention to detail (e.g. when teaching); patiently
guidance; leadership; instruction; shido (disciplinary action for a minor infringement of the rules of judo)
(not) even once; (not) ever
hundred battles; many battles
Spring and Autumn period (of Chinese history, approx. 770-403 BCE)
Sun Tzu (Chinese general and strategist, 544-496 BCE)
The Art of War (military text by Sun Tzu, 512 BCE)
art of war; strategy; tactics
to load (a gun, etc.); to charge; to put into (e.g. emotion, effort); to include (e.g. tax in a sales price); to hang over; to shroud
rolling stock; railroad cars; wheeled vehicles
counter for carriages (e.g. in a train); counter for vehicles
combat engineer; military engineer; combat engineering; military engineering
repeated at intervals; every other (day, week, month, ...)
great achievement; great feat; great work; great undertaking
to etch into one's mind; to remember well
class; level; stratum; layer; hierarchy
logistics; supply; communications
selection; classification; sorting; screening; triage
decider; person who decides; deciding factor; clincher; trump card
return path (of a signal, communication); return trip
induced explosion; secondary explosion