start; commencement; beginning; initiation
chime; bell (e.g. doorbell)
to sound; to ring; to resound; to echo; to roar; to rumble
first of all; at once; for now; for the time being; anyway; at least
existence; being; presence
from the beginning; without hesitation; entirely; completely; head-on; head-first
to get rid of; to erase; to dispel; to eradicate; to wipe away
lesson; class; teaching; instruction; classwork; schoolwork
concentration (on a task); focusing one's attention; concentration (of population, buildings, power, etc.); centralization; within a collection of works
professor; teaching; instruction
with a whiff; with a puff; suddenly; abruptly; without warning
abruptly; suddenly; all of a sudden; without warning
to laugh; to smile; to sneer; to ridicule; to be dumbfounded; to be flabbergasted
at the same time; at once; just as ...; the moment ...; (but) at the same time; as well as
single word; a few words; brief comment
to let out; to utter; to issue; to send; to leave; to depart
teacher; instructor; sensei; title or form of address for a teacher, master, doctor, lawyer, etc.; intimate or teasing form of address; (arch.) one's elder
baldness; bald head; bald person; baldy; idiot; moron
is not; am not; are not; isn't it?
you; buddy; monarch; ruler; he; she
to be silent; to say nothing
yes; that is correct; um; errr; huh?; grrr
second-year student; second-year pupil; biennial; biennial plant
to take lessons in; to be taught; to learn (from a teacher); to study (under a teacher); to get training in
column (of data); column (used in distillation, column chromatography, etc.)
separation; partition; detachment; segregation; isolation
degree (angle, temperature, scale, etc.); counter for occurrences; strength (of glasses); glasses prescription; alcohol content (percentage); alcohol by volume; extent
step; stair; shelf; layer; grade; level; dan (degree of advanced proficiency in martial arts, go, shogi, etc.)
several; a few; number; quantity; counting; calculation; number
direction; way; person; lady; method of; manner of; care of ...
official; formal; formula (e.g. mathematical); official (social media) account (of a company, organization, etc.)
diligently; seriously; perfectly; properly; sufficiently; satisfactorily
head; hair (on one's head); mind; brains; leader; chief; top
dimly; faintly; absentmindedly; vacantly; idly; aimlessly
judgment; judgement; divination; judgement
serious; earnest; sober; honest; sincere
all; entire; whole; altogether
but; however; although; though
contents; content; substance; matter; detail; import
tightly (holding on); firmly; strongly (built); solidly; properly; well
really; truly; indeed; good grief
textbook; coursebook; schoolbook