buttocks; behind; undersurface; bottom; last place; end
monitoring; watching; observation; surveillance; guarding; supervision
heart; guts; nerve; heart (of something); central part
thump-thump; bang-bang; pit-a-pat; to beat fast (of one's heart); to throb; to pound
to try (out); to have a try (at); to test; to put to the test
success; achievement; succeeding (in life); (worldly) success; prosperity
research institute; (research) laboratory
experiment; experimentation
to see to it that ...; to make sure that ...; to try to ...; to make an effort to ...
special; particular; peculiar; unique
to throw into; to toss into; to throw-in; to play a throw-in
old; former; the old; old things; old times; bygone days
great difference; big difference; wide margin
in a sense; in some way; to an extent
very interesting; of great interest
love potion; philter; aphrodisiac
have to (do, be); must (do, be); is indispensable; is absolutely necessary
with a rustling sound; (rummaging) around
soliloquy; monologue; speaking to oneself
excited; enthusiastic; high-tensile (e.g. steel); high-voltage (e.g. circuit); high-tension (e.g. current)
unconsciousness; unconscious; involuntary; the unconscious
pillow; bolster; introduction (e.g. to a rakugo story); lead-in
to throw; to hurl; to give up; to abandon; to cast (a glance, shadow, doubt, etc.)
to take offense; to take offence; to get angry; to lose one's temper
crisis; critical situation; emergency; pinch
defenseless; defenceless; unprotected; vulnerable
check (pattern); plaid; check; inspection; check (mark); tick; checking (something) out
being extremely fond of; having a weakness for; having no eye for; being a poor judge of; having no chance (of succeeding)
secret manoeuvres (maneuvers); operating behind the scenes
use; utilization; utilisation; application
high-class; high-grade; high-quality; high-ranking; high-level; senior
polite; respectful; reverent
back seat (of a car); rear seat
to make a mistake (in); to commit an error; to get wrong; to mistake (one thing for another); to confuse
to be noisy; to be astir; to be abuzz; to be in commotion; to be aflutter; to be unsettled
thing; matter; incident; occurrence; circumstances; situation; work