A lábas nagy.

In Hungarian, a is the definite article the, not the indefinite article.

• a is used before a consonant
• az is used before a vowel

So A lábas means the pot.

If you wanted a pot, Hungarian would normally use egy lábas.

Hungarian usually leaves out is in the present tense when the sentence is:

• third person
• and the predicate is a noun or adjective

So:

• A lábas nagy. = The pot is big.

This is completely normal in Hungarian.

But in other persons, the verb appears:

• Nagy vagyok. = I am big.
• Nagy vagy. = You are big.

Because here nagy is not just modifying the noun inside a noun phrase; it is the predicate of the sentence.

Compare:

• a nagy lábas = the big pot
  
  • here nagy comes before the noun
• A lábas nagy. = The pot is big.
  
  • here nagy comes after the noun because it is the predicate

So the position changes depending on whether you mean:

• the big pot
  or
• the pot is big

A good rough pronunciation is LAA-bosh.

A few useful points:

• Hungarian stress is almost always on the first syllable: LÁ-bas
• á is a long vowel
• s in Hungarian is pronounced like English sh

So lábas sounds approximately like LAA-bosh.

The accent marks vowel length and helps distinguish sounds.

In lábas, the á is longer than a plain a.

So:

• a and á are different vowels in Hungarian
• the accent is not optional spelling decoration; it is part of the word

This matters for both pronunciation and correct spelling.

Not in this sentence. Here lábas is just the full dictionary word.

So you should learn lábas as a whole noun.

For example, the plural is:

• lábasok = pots

That shows the final -s is not the plural ending. It belongs to the word itself.

Yes. Hungarian word order is flexible, and changing it often changes the emphasis.

• A lábas nagy. = neutral statement, The pot is big.
• Nagy a lábas. = more emphasis on big, something like The pot is big / It’s the pot that’s big

So the original order is a normal, neutral way to say it, but other orders are possible depending on focus.

Hungarian has no grammatical gender, so nagy does not change for masculine, feminine, or neuter.

In this sentence the subject is singular, so the predicate adjective stays singular:

• A lábas nagy.

With a plural subject, Hungarian often uses a plural form in the predicate:

• A lábasok nagyok. = The pots are big.

So there is no gender agreement, but number can matter in predicate position.