precondition; prerequisite
to make a mistake; to be incorrect; to be mistaken
appropriate; suitable; fitting; apt; proper; right
to return; to come back; to turn over; to become extremely; to become completely
likability; favorability; popularity
increasing; uploading; posting (e.g. content); close-up; finishing shooting (of a film, etc.); upswept hairstyle; being up (i.e. leading in sports)
most suitable; optimum; optimal; best
solution (of an equation, inequality, etc.); root (e.g. of a polynomial); solution (to a given problem); answer; explanation; interpretation
worst; horrible; horrid; in the worst case; if worst comes to worst
after school (at the end of the day)
alone; by oneself; on one's own
secret; secrecy; mystery; secret (e.g. to success); esoteric teachings
special training; intensive training; crash course
vivid; bright; brilliant; skillful; skilful; adept
chest; breast; breasts; bosom; heart; lungs; stomach
with a pitter-patter; choked up (with emotion); heart-wringing; momentary tightening of one's chest caused by powerful feelings (e.g. parting with a loved one)
men and women; man and woman; both sexes; both genders
replacement; substitution; change; shunting (rail); switching
certain; sure; definite; reliable; sound; solid
rising; ascending; climbing
calculation; reckoning; count; forecast
certain; sure; doubtless; I have no doubt; You can depend on it; It's a safe bet
behind; rear; after; later; remainder; the rest; more (e.g. five more minutes)
place; situation; position; location
thank you for your hard work; good work; see you; goodbye; goodnight
to throw away; to cast away; to abandon; to desert; to give up; to resign
to lend; to loan; to rent out; to hire out
trajectory; line of fire; ballistic
device; equipment; machinery; apparatus
starting point; origin; origin (of coordinate axes); datum point
altitude; height; elevation; high-degree; high-grade; advanced
body; physical system; (the) person
function; facility; faculty; feature
most; highest; maximum; best; wonderful; finest
to be furnished with; to be provided with; to be possessed of; to be endowed with; to be among; to be one of
no!; no no!; no, not at all
root of an evil; source of a problem; source of trouble; cause of misfortune
far away; distant place; long ago; far back; by far
ordinary; nothing special; nothing to exclaim over