
IdiomDaily Life
Polish
papierek lakmusowy
Meaning: A decisive test that reveals the true nature or quality of something.
Literally: Litmus paper
Example: “Pierwsza zima będzie papierkiem lakmusowym dla nowego dachu.” — The first winter will be the acid test for the new roof.
English equivalent: Acid test
Equivalents in other languages
English: acid test
Origin: From chemistry: litmus paper, dyed with a colorant extracted from lichens, turns red in acid and blue in alkali, giving an instant and unmistakable result. In Polish, as with English "litmus test," papierek lakmusowy is any test that reveals the true nature of something or someone at once.
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