I know the meaning of the phrase verb set up in this context. But what does set and up mean separately here? In other word, I want to figure out the inner logic of this phrase. It would be great to show me the corresponding explanations in a dictionary, thanks in advance.
Set up X is an example of a phrasal verb.
The spectators SET UP a howl of protest
This is a not-too-common meaning of set up as described here: "begin making a loud sound."
Etymonline.com shows that the etymology of this word is all over the place - root words had meanings related to sit, meanings related to sect, and pertinent to this example: a meaning related to "cause/make to do".
Modern use of set is all over the place too.
As far as why up - while there's a logical connection between base and particle for many phrasal verbs, there isn't for all of them - e.g. what does the out in carry out--in the sense of "perform orders"--mean? Why is the word come used in the phrasal verb come apart, when come means subject and a target move closer together? Why does make up X mean to create a fake X?
Logic only takes you so far with English, there's numerous dead ends.
When up is used in a phrasal verb, it usually carries one of these basic meanings:
- completion (finish up, eat up, write up, wrap up);
- upward movement (pick up, lift up);
- upright position, maintaining or strengthening it (prop up, shore up);
- increase, improvement (pep up, jazz up)
In your sentence, it has a meaning of completion. They arranged it, and they started it.