Kvásek je natolik dobrý, že rozkvas rychle vykyne.

The sourdough starter is so good that the levain will rise quickly.

Breakdown of Kvásek je natolik dobrý, že rozkvas rychle vykyne.

• být: to be
• dobrý: good
• rychle: quickly
• kvásek: the sourdough starter

Questions & Answers about Kvásek je natolik dobrý, že rozkvas rychle vykyne.

What does natolik mean here?

Natolik means so much, to such an extent, or so in the sense of degree.

In this sentence, natolik dobrý, že... means so good that...

A very close structural equivalent in English is:

• The starter is so good that the preferment rises quickly.

So natolik sets up a result, and the clause after že tells you what that result is.

Why is že used in this sentence?

Že means that and introduces the result clause.

The pattern is:

• natolik / tak + adjective/adverb + že ...
• so ... that ...

So:

• Kvásek je natolik dobrý, že...
• The starter is so good that...

This is a very common Czech structure for expressing consequence or result.

Why is it dobrý and not dobře?