गुब्बारा लाल है।

A natural pronunciation is:

gubbārā lāl hai

A rough English-friendly guide:

• गु = gu as in good (but shorter)
• ब्बा = bbā, with a doubled b sound and a long aa
• रा = rā
• लाल = lāl
• है = hai, pronounced like heh or hai depending on accent and speed

So the whole sentence sounds roughly like:

gub-baa-raa laal hai

The sentence breaks down like this:

• गुब्बारा = balloon
• लाल = red
• है = is

So the structure is:

गुब्बारा + लाल + है
balloon + red + is

This is a very common Hindi pattern for X is Y.

Because here लाल is a predicate adjective, not an adjective directly attached to the noun inside a noun phrase.

Compare:

• लाल गुब्बारा = red balloon
• गुब्बारा लाल है = the balloon is red

In English, both kinds use red, but the position changes too:

• red balloon
• the balloon is red

Hindi works similarly:

• Before the noun when it directly describes it: लाल गुब्बारा
• After the noun when it is part of is red: गुब्बारा लाल है

है is the present-tense form of the verb to be for he/she/it/this/that and also for singular nouns in sentences like this.

So in गुब्बारा लाल है, है means is.

A few related forms:

• मैं ... हूँ = I am
• तुम ... हो = you are
• वह ... है = he/she/it is
• वे ... हैं = they are

Since गुब्बारा is singular, है is the correct form.

Hindi usually does not use articles the way English does.

So गुब्बारा can mean:

• a balloon
• the balloon

The exact meaning depends on context.

That means गुब्बारा लाल है could be understood as:

• A balloon is red
• The balloon is red

In normal usage, context tells you which one is intended.

Yes, गुब्बारा is masculine singular.

One clue is the ending -ा (-ā), which often suggests a masculine noun in Hindi. This is not a perfect rule, but it is very common.

This matters because gender affects many adjectives and verbs in Hindi. For example, with a changing adjective like बड़ा (big):

• गुब्बारा बड़ा है। = The balloon is big.
  masculine singular

If the noun were feminine, the adjective might change:

• गेंद बड़ी है। = The ball is big.

Because लाल is an invariable adjective in Hindi.

Some adjectives change according to gender and number:

• अच्छा → अच्छी → अच्छे
• बड़ा → बड़ी → बड़े

But some adjectives do not change:

• लाल
• खुश
• गरीब

So you get:

• गुब्बारा लाल है।
• गेंद लाल है।
• गुब्बारे लाल हैं।

In all of these, लाल stays the same.

You would say:

गुब्बारे लाल हैं।

Changes:

• गुब्बारा → गुब्बारे for masculine plural
• है → हैं for are

So:

• गुब्बारा लाल है। = The balloon is red.
• गुब्बारे लाल हैं। = The balloons are red.

In standard, complete Hindi sentences like this, you normally keep है.

So the normal sentence is:

• गुब्बारा लाल है।

You may sometimes hear omission in:

• very casual speech
• poetry
• headlines
• stylized expressions

But for learning correct standard Hindi, it is best to include है.

Not exactly.

लाल गुब्बारा means red balloon as a noun phrase.

So लाल गुब्बारा है sounds more like:

• It is a red balloon
• There is a red balloon
  depending on context

But गुब्बारा लाल है specifically means:

• The balloon is red

So the word order changes the function:

• लाल गुब्बारा = adjective + noun
• गुब्बारा लाल है = noun + predicate adjective + is

It is written in the Devanagari script, which Hindi uses.

A few things a learner might notice:

• The horizontal top line is normal in Devanagari
• । at the end is the Hindi full stop, called danda
• Consonants and vowels combine into one written system rather than being written exactly like the Roman alphabet

So:

• गुब्बारा लाल है। ends with ।, which functions like a period in English.