0 the use of two negatives (= words that mean "no") in the same phrase or sentence: --
The phrase "a not unfamiliar situation" is an example of a double negative.
1 the use of two negative words together in a statement that has a negative meaning, as in "I didn't do nothing." --
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Vi kan slutföra det steg för steg hur lång vägen än är och den kan inte slutföras hur kort vägen än är om du inte ens markerar ditt fotavtryck.