0 a phrase that consists of a verb with a preposition or adverb or both, the meaning of which is different from the meaning of its separate parts: --
1 a combination of a verb and an adverb or a verb and a preposition, or both, in which the combination has a meaning different from the meaning of the words considered separately: --
"Catch on" is a phrasal verb meaning to understand.
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.