Learn Hardcore Hungarian: A karkötő hibátlan.

In Hungarian, the verb to be is often left out in the present tense when the subject is third person and the predicate is a noun or adjective.

So:

A karkötő hibátlan. = The bracelet is flawless.

But in other persons, Hungarian does use the verb:

Hibátlan vagyok. = I am flawless.
Hibátlan vagy. = You are flawless.

This missing is is completely normal in Hungarian.

What does a mean here, and why is it a instead of az?

A is the Hungarian definite article, meaning the.

Hungarian has two forms of the definite article:

a before a consonant sound
az before a vowel sound

Since karkötő begins with the consonant k, you say:

a karkötő = the bracelet

Compare:

az alma = the apple

So the choice depends on the sound that follows, much like a/an in English.

Is hibátlan an adjective?