Er blufft und gewinnt.

Because the subject is er (he), and in the present tense German verbs usually take -t with er / sie / es.

• bluffen → er blufft
• gewinnen → er gewinnt

So the sentence uses normal 3rd person singular present tense forms.

In German, just like in English, you do not have to repeat the subject when two verbs share the same subject and are linked by und.

So:

• Er blufft und gewinnt. = He bluffs and wins.

You could also say:

• Er blufft und er gewinnt.

But that sounds more repetitive and is usually unnecessary unless you want extra emphasis.

Because und does not change normal word order. It simply connects two equal parts.

In a main clause, German usually puts the conjugated verb in second position:

• Er blufft.
• Er gewinnt.

When joined with und, each part keeps normal main-clause word order:

• Er blufft und gewinnt.

Compare that with a subordinating conjunction like weil, where the verb goes to the end:

• ..., weil er gewinnt.

So und is not one of the words that sends the verb to the end.

Yes. bluffen is a normal German verb, although it originally comes from English/French. German uses it especially for bluffing in games, poker, or more generally pretending to be stronger, more confident, or better prepared than you really are.

It behaves like a regular German verb:

• ich bluffe
• du bluffst
• er blufft

So even though it may look familiar to an English speaker, it is fully integrated into German grammar.

The verb gewinnen is one of those German strong verbs that changes its stem vowel in the du and er/sie/es forms of the present tense.

Its forms are:

• ich gewinne
• du gewinnst
• er gewinnt

So gewinnt is not random; it is the standard present-tense form for er.

A learner may find blufft tricky because of the final consonant cluster.

A rough guide:

• blufft sounds like blooft but with the German u in Bluff
• the end -fft is pronounced clearly: first f, then t

So it is essentially one syllable: blufft.

Also, the u in Bluff is short, like in put for many English speakers, not like the oo in food.

It can mean either, depending on context. German present tense often covers both:

1. Right now / in the current situation

   • He is bluffing and winning.

2. Habitual or general

   • He bluffs and wins.

German often relies on context instead of using a special continuous form like English is bluffing.

Yes, grammatically you can. It would mean He wins and bluffs, but the order changes the focus slightly.

• Er blufft und gewinnt. suggests: first he bluffs, and as a result he wins.
• Er gewinnt und blufft. presents the actions in the opposite order, or simply gives them in a different sequence.

So both are grammatical, but the original sentence feels more natural if the intended idea is he wins by bluffing or he bluffs, then wins.

No comma is needed here.

German normally does not use a comma before und when it simply connects two verbs or two main-clause elements in a straightforward way:

• Er blufft und gewinnt.

A comma would only appear in more special cases, not in this simple sentence.

Yes. In this sentence, und connects two actions with the same subject, so the subject is mentioned only once:

• Er blufft und gewinnt.

But it can also connect two full clauses:

• Er blufft, und sie gewinnt.

There, the second clause has a different subject, so sie must be stated.

So in your sentence, und is linking two predicates that belong to the same subject er.