Questions & Answers about Plyn je spíš levný.
Spíš usually means rather, quite, more on the ... side, or fairly in this kind of sentence.
So Plyn je spíš levný suggests something like:
- Gas is rather cheap
- Gas is fairly cheap
- Gas is more on the cheap side
It often makes the statement sound a bit softer or less absolute than simply saying Plyn je levný.
Because levný is an adjective, and here it is describing plyn after the verb je.
In Czech, after být (to be), you normally use an adjective that agrees with the noun:
- Plyn je levný. = Gas is cheap.
- Voda je studená. = The water is cold.
By contrast, levně is an adverb, meaning cheaply:
- Prodává to levně. = He/she sells it cheaply.
So:
- levný = cheap
- levně = cheaply