Learn Swedish: Maten var jättebra, tack! - The food was really good, thanks!

The prefix jätte- (which literally means giant) is extremely productive in Swedish, meaning you can attach it to almost any adjective to intensify it. While mycket bra (very good) is grammatically correct, jättebra sounds much more natural and enthusiastic in everyday conversation, similar to saying super good or really great.

Does the prefix jätte- change if the noun is plural or a different gender?

The prefix itself never changes, but the adjective attached to it might. In this sentence, bra is an indeclinable adjective, meaning it never takes a -t or -a ending. If you used a declinable adjective like god, you would decline the base word but leave the prefix alone, resulting in jättegod for an en-word, jättegott for an ett-word, or jättegoda for plurals.

Can jätte- be used with negative adjectives, or only positive ones?

It works perfectly with negative adjectives as well! You can say jättedålig (really bad), jättedyr (really expensive), or jättetråkig (super boring). It functions purely as a degree amplifier regardless of the adjective's underlying positive or negative meaning.

Why end with just tack instead of the classic phrase tack för maten?