Translation:This is what I like to do more than anything every day.
I'll give it a stab.
'wat' in 'dit is wat' introduces a subordinate clause, so the verb goes at the end. The bit that really makes the word order weird is the 'het allerliefst', which turns 'doe' from 'do' to 'like to do the most of all'. The 'aller-' bit contributes the 'of all' bit, '-lief-' is the bit that contributes 'like to' and '-st' contributes 'the most'.
Without 'het allerliefst', 'dit is wat ik elke dag doe' is 'this is what I do every day'. Throw in 'het allerliefst', and then it becomes 'this is what I [like to] do [most of all] every day'.
In U.S. English, which is my first language, I'd translate this sentence as "This is what I like to do more than anything else every day." The addition of "else" was tagged as incorrect. It's weird, because the use of "else" in comparisons feels more natural than leaving it out.
Why not "This is my very favorite thing to do every day." ?? That is probably a more normal way to express the notion than anything here. As we do still use liefer occasionally as an adverb (it is considered obsolete as an adjective) and they seem to want a close translation, why not "This is what I liefest of all do every day."
(Where I grew up we said 'lievest' when we used this, but it's not found much in dictionaries that way anymore, and sounds kind of quaint. "Liefer" sounds like Renaissance Faire talk to me, but if you want to get close . . .)
"liefst" means: "most", but if that word is not strong enough you can use: "most of all" or "allerliefst". The word is longer which makes is stronger. It is a word used by children if. It is also childish. "Do you know what is would really, really like most"? It is used in these kind of settings
no, sorry. "Allerliefst" can be translated to "preferably", "most of all", "mostly". https://translate.google.com/#nl/en/Allerliefst. It (Allerliefst) is used in a comparision. Where "loveliest" is not. "This is the loveliest dessert" Is not a comparison. But it is very close, i agree. https://translate.google.com/#en/nl/loveliest The english sentence would not make sense with the word loveliest. It would be something like: This is what I like the loveliest to do every day.