One World Built On A Firm Foundation
Music0 min ago
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For more on marking an answer as the "Best Answer", please visit our FAQ.There's not a great deal I can add, to be honest. Such 'up' phrasal verbs date back to at least the 1100s in English, with 'give up', meaning 'surrender' being the oldest recorded. There are many of them that appear to have no rhyme or reason behind them...wake up, speak up, light up, dress up and so forth all appear to have no 'directional' quality to them whatever. And there is further confusion in that, in several cases, the 'up' can be replaced by 'down', as others have said. "It's up to you" means exactly the same as "It's down to you" in modern British usage, for example.
Here's a nice quote that sums up - geddit?! - the situation...
"If you're up to it, you might try building up a list of the many ways in which 'up' is used. It may take up a lot of your time but if you don't give up, you may wind up with a thousand."
The simple answer to your question, Mobious, therefore, is that there is no real relevance other than the great god 'usage'.
Hi Mobius - you're the guy who invented vector notation in about 1860 arent you? and got a band named after yourself?
Anyway - up is used as an adverb.
The same difficulty is experienced by non english speaker with to go and to go away
You havent even started with to put, to put up, and to put up with....
They're all phrasal verbs and you're not alone - they cause difficulty with everyone. The English just sort of learn them so early (three or four) that we dont notice.
Good luck