language of one's country; mother tongue; native language
child's mind; childlike innocence; naivete
to be too busy; to be occupied; to concentrate on single-mindedly
waste; scrap; garbage; scum; piece of trash; loser
to take a breath; to take a short rest
misfortune; bad luck; ill luck; ill fortune
dull; slow; stupid; dull-brained
business world; business circles; (the) industry
stain; blot; flaw; disgrace
being able to hear everything (esp. when one was not intended to)
long-established; old-established; traditional
small private school (esp. for cramming); private school (in the Edo period, orig. run by Confucianists)
tip-top; top; top-drawer; best; foremost; elite
to rub; to chafe; to wear out; to become worn; to lose one's innocence; to become sly
binder; clipboard; binding machine (wheat, etc.); binder
one grade; first-class; primary
half-term; half-time; half period
to amass; to accumulate; to store; to leave unpaid
official; formal; formula (e.g. mathematical); official (social media) account (of a company, organization, etc.)
(tear) to pieces; (rip) apart; with a rattle; with a shudder; feeling an electric shock
application problem; exercises
display; array (of things); succession (of things)
individual lesson; tutorial; one-on-one instruction
yours sincerely; respectfully yours
review (of learned material); revision
to read (a book, etc.) over again
to begin; to set about; to start
omission (of middle part of a text); ellipsis
to strike (with a stick, whip, etc.); to hit; to punch; to go to (a place to eat, drink, etc.)
keychain; key chain; key ring (encryption)
unflaggingly; steadily; untiringly; knocking; tapping; clicking
go on!; right!; here goes!