Questions & Answers about Chci si tipnout odpověď.
Chci is the 1st person singular present of chtít.
si is a short reflexive/dative clitic.
tipnout is an infinitive.
odpověď is the direct object of tipnout.
So the basic pattern is:
chci + infinitive + object
with si included because tipnout si is a very natural Czech expression.
In this sentence, si is part of the common expression tipnout si, which means something like to take a guess.
It does not usually need to be translated separately into English. Czech often uses si/se in places where English uses nothing at all.
Here, si gives the verb a natural, idiomatic feel. A learner can think of tipnout si as a chunk meaning to have a guess / to make a guess.
Sometimes Czech speakers do omit it in some contexts, but tipnout si is very common and very natural when you mean to make a guess.
So for a learner, the safest choice is:
Chci si tipnout odpověď.
If you say Chci tipnout odpověď, people will probably understand you, but it may sound less idiomatic in many situations.