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ua   Ukraine

What does adding 'up' to a verb mean?

January 31 um 21:51

Recently I have faced these two sentences "There's probably something trapped up in their ventilation system." and "... the other three scouting up the hallway."

It is a bit unclear for me how does the word 'up' change definition of a verb in those examples or similar situations? It looks like without 'up' the verb has the same meaning.

I have found this explanation "It reinforces the action of the meaning of the verb". It seems ok, but I'm not complitely sure.

Could someone make it more clear?