Mirosul este groaznic.

Mirosul is the noun miros with the definite article attached.

• miros = smell, odor
• -ul = the for this masculine singular noun

So:

• miros = smell
• mirosul = the smell

This is very typical in Romanian: the definite article usually goes at the end of the noun instead of being a separate word in front.

Romanian works differently from English here. It usually uses a postposed definite article, which means the article is added to the end of the noun.

Examples:

• băiat = boy

• băiatul = the boy

• miros = smell
• mirosul = the smell

So mirosul is not a special separate word you just memorize on its own; it is miros + -ul.

Este is the 3rd person singular form of a fi, meaning to be.

So the structure is:

• Mirosul = the smell
• este = is
• groaznic = awful / terrible / horrible

Romanian normally needs the verb to be in this kind of sentence, just like English does. So Mirosul este groaznic is a normal complete sentence.

Yes. E is a very common short form of este.

So both are correct:

• Mirosul este groaznic. = more full, neutral, standard
• Mirosul e groaznic. = very common in everyday speech

You will hear e a lot in conversation.

Because the adjective has to agree with the noun in gender and number.

Miros is a masculine singular noun, so the adjective is also masculine singular:

• miros groaznic
• mirosul este groaznic

If the noun were feminine singular, you would usually get groaznică instead.

For example:

• situația este groaznică = the situation is terrible

So in your sentence, groaznic matches mirosul.

No. Miros is more neutral than English stink. It can mean smell, odor, or sometimes even scent, depending on context.

The negative feeling in this sentence comes mainly from groaznic.

So:

• miros by itself = neutral
• miros groaznic = awful smell
• miros plăcut = pleasant smell

If Romanian wants a clearly bad smell, it can use stronger words too, depending on context.

Groaznic is fairly strong. It usually means something like:

• awful
• terrible
• horrible

It is stronger than just rău in many contexts.

So Mirosul este groaznic sounds stronger than simply saying the smell is bad. It suggests the smell is really unpleasant.

A helpful approximation is:

mee-RO-sool YES-te gro-AZ-neek

A more phonetic version is:

/miˈro.sul ˈjes.te ɡroˈaz.nik/

A few notes:

• mirosul has stress on -ros-
• este often sounds like YES-te
• groaznic has stress on -az-
• Romanian r is usually rolled or tapped
• Romanian vowels are usually pronounced clearly, not reduced as much as in English

Yes, but Mirosul este groaznic is the most neutral and natural order.

Romanian can move words around more than English for emphasis, but changing the order can sound marked or literary.

For example:

• Mirosul este groaznic. = neutral
• Este groaznic mirosul. = more emphatic, less neutral, often context-dependent

As a learner, the normal order is the safest choice.

You would change both the noun and the adjective, and also use the plural of to be:

• Mirosurile sunt groaznice. = The smells are awful.

Breakdown:

• mirosurile = the smells
• sunt = are
• groaznice = awful, plural form

This shows that adjectives in Romanian agree not only in gender, but also in number.

You would say:

• un miros groaznic = an awful smell

That is different from:

• Mirosul este groaznic. = the smell is awful

So the difference is:

• un miros groaznic = noun phrase
• Mirosul este groaznic. = full sentence

This is useful because Romanian often uses the same adjective, but the sentence structure changes depending on whether the adjective is describing the noun inside a noun phrase or acting as the predicate after to be.

In this sentence, mirosul is in the normal subject form, which for Romanian is nominative.

So grammatically, it is the subject of the sentence:

• Mirosul = subject
• este = verb
• groaznic = predicate adjective

At beginner level, the most important thing to notice is simply that mirosul is the subject and means the smell. The case detail becomes more important later when you compare it with other forms in different contexts.