Suurdeeg literally means sour dough, but in normal usage it usually refers to sourdough or a sourdough starter, depending on context.
It is a compound word:
So it works much like English compound nouns.
Yes, you could, but the meaning shifts slightly.
Use is for simple location. Use bly when you want to emphasize that it continues to be kept there.
Lugdigte means airtight.
The base adjective is lugdig = airtight. When an adjective comes before a noun in Afrikaans, it often takes an extra -e ending:
So the -e is there because the adjective is being used directly before blik.
Blik can mean tin, can, or sometimes a metal container.
In this sentence, the most natural English meaning is probably container or tin, depending on context. If this is about storing sourdough starter, airtight container is usually the best translation.
So die lugdigte blik is best understood as the airtight container/tin.
A simple English-friendly guide would be:
A few useful notes:
Yes. Afrikaans, like Dutch and German, likes compound words.
This is very normal in Afrikaans. English sometimes writes similar ideas as one word, two words, or hyphenated words, but Afrikaans often prefers a single compound word.
So learners should get used to seeing long words that are built from smaller meaningful parts.