to establish a mapping (of mathematical elements or sets) krzyżówka

go back to a previous state; "We reverted to the old rules" lower the pitch of (musical notes) go down in value; "Stock prices dropped" finish up or conclude; "They topped off their dinner with a cognac"; "top the evening with champagne" be the culminating event; "The speech crowned the meeting" make or leave a mark on; "the scouts marked the trail"; "ash marked the believers' foreheads" mark with an asterisk; "Linguists star unacceptable sentences" be restored; "Her old vigor returned" change from one level to another; "She dropped into army jargon" omit (a letter or syllable) in speaking or writing; "New Englanders drop their post-vocalic r's" stop pursuing or acting; "drop a lawsuit"; "knock it off!" finish a game in baseball by protecting a lead; "The relief pitcher closed with two runs in the second inning" set out on (an enterprise or subject of study); "she embarked upon a new career" proceed for an extended period of time; "The speech dragged on for two hours" become focussed or come into focus; "The light focused" put (an image) into focus; "Please focus the image; we cannot enjoy the movie" cause to burst with a loud, explosive sound; "The child popped the balloon" burst open with a sharp, explosive sound; "The balloon popped"; "This popcorn pops quickly in the microwave oven" insert punctuation marks into fall or sink into a state of exhaustion or death; "shop til you drop"