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A1 · Beginner Countable noun

n. the part of something that is furthest from the front.

n. the part or area of an object or location that is opposite the front or main side.

日本語:後ろ※

“The answers to the exercises are at the back of the book.”

“We found a small, quiet table at the back of the restaurant, away from the noise of the busy street.”

B1 · Intermediate Countable noun Sports

n. a player in a game like football who stays near their own goal to defend.

n. a defensive player whose primary role is to prevent the opposing team from scoring.

日本語:バックス※

“The team has a very strong left back who stops most attacks.”

“The coach decided to play with four backs to ensure the defense remained solid against the league's top strikers.”

B2 · Upper Intermediate

v. to give help or support to a person, plan, or idea.

v. to provide moral, financial, or political support to an individual or initiative.

“Many local businesses decided to back the new community center project.”

“The investors refused to back the startup until the founders could provide a more detailed three-year financial forecast.”

B1 · Intermediate

v. to move a vehicle or yourself backwards.

v. to cause a vehicle or person to move in a reverse direction.

“He had to back the car into the narrow garage very slowly.”

“The truck driver carefully backed the trailer toward the loading dock while a colleague signaled from the ground.”

A1 · Beginner

adv. returning to a place where you were before.

adv. indicating a return to a previous location, state, or condition.

“When do you think you will be back from your holiday?”

“After wandering through the forest for hours, they finally found the trail that led them back to the campsite.”

A2 · Elementary

adv. at a time in the past.

adv. referring to a point in time previous to the present.

“Back in the 1990s, nobody had a smartphone.”

“The traditions of this village date back several centuries to a time before the industrial revolution.”

A2 · Elementary

adj. located at the rear or the end of something.

adj. situated at the rear; often used attributively to describe position.

“We usually use the back door because it is closer to the driveway.”

“The back garden was overgrown with weeds, contrasting sharply with the neatly manicured lawn at the front of the house.”

B2 · Upper Intermediate

adj. relating to the past or money that was not paid on time.

adj. referring to previous issues of a publication or payments that are in arrears.

“The company owes its employees three months of back pay.”

“The researcher spent the afternoon in the library archives looking through back issues of the local newspaper from the 1950s.”