lost

A2 · Elementary

adj. something that cannot be found or is no longer with its owner.

adj. denoting an object that is missing, misplaced, or no longer in the possession of its owner.

“She put up posters around the neighbourhood to help find her lost cat.”

“The museum managed to recover several lost artefacts that had been missing since the conflict in the late nineteenth century.”

B2 · Upper Intermediate

adj. time or an opportunity that was not used well and is now gone.

adj. referring to time, effort, or opportunities that have been wasted or allowed to pass without profit.

“I spent the whole afternoon playing games, so it was basically a lost day.”

“The management regretted the lost opportunity to expand into the Asian market when their competitors were still relatively small.”

B2 · Upper Intermediate

adj. giving so much attention to something that you do not notice anything else.

adj. fully absorbed or engrossed in a thought, activity, or emotion to the exclusion of external reality.

“He was so lost in his book that he didn't hear me enter the room.”

“She sat by the window for hours, lost in thought as she contemplated the difficult decision she had to make regarding her career.”