Frica este puternică.

Because -a at the end is the definite article attached to the noun.

• frică = fear / a fear
• frica = the fear

Romanian usually puts the at the end of the noun instead of using a separate word before it.

So:

• frică = indefinite
• frica = definite

In a sentence like Frica este puternică, Romanian often uses the definite form for general statements about abstract ideas, much like English can say Fear is powerful.

Romanian normally uses a postposed definite article, which means the article is added to the end of the noun.

Examples:

• băiat = boy

• băiatul = the boy

• frică = fear
• frica = the fear

This is a normal feature of Romanian grammar and is one of the things that makes it different from English.

Este means is.

It is the 3rd person singular form of the verb a fi = to be.

So:

• eu sunt = I am
• tu ești = you are
• el/ea este = he/she/it is

In this sentence, Frica este puternică literally matches English structure very closely:

• Frica = fear / the fear
• este = is
• puternică = powerful

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

So both are correct:

• Frica este puternică.
• Frica e puternică.

The version with e is very common in everyday speech.
The version with este can sound a bit more formal, careful, or emphatic.

Because the adjective has to agree with the noun.

Frica is a feminine singular noun, so the adjective must also be feminine singular:

• masculine singular: puternic
• feminine singular: puternică

Examples:

• un bărbat puternic = a strong man
• o femeie puternică = a strong woman
• frica este puternică = fear is powerful

So the ending -ă shows feminine singular agreement.

One clue is the form of the adjective: puternică is feminine singular, so it tells you that frica is feminine.

Also, many Romanian nouns ending in -ă in the dictionary form are feminine, though not all patterns are perfectly predictable.

You can also see it with the indefinite article:

• o frică = a fear

The use of o shows that frică is feminine.

Yes, this sentence uses the most neutral and common word order:

• Frica = subject
• este = verb
• puternică = predicate adjective

So it follows the basic pattern:

Subject + to be + adjective

Romanian word order is somewhat flexible, but Frica este puternică is the normal straightforward version.

Yes, Romanian allows some flexibility, but changing the order usually changes the emphasis or makes the sentence sound more literary.

For example:

• Frica este puternică. = neutral, standard
• Puternică este frica. = more emphatic or poetic

A learner should usually stick with Frica este puternică unless there is a special reason to emphasize something.

That is a diacritic, and it is an important part of Romanian spelling.

The letter ă is a separate Romanian vowel, pronounced roughly like the a in sofa in many English accents: a short schwa sound /ə/.

So:

• frică ends with /kə/
• puternică also ends with /kə/

You should not ignore ă, because it is not just decoration; it changes both spelling and pronunciation.

A simple pronunciation guide is:

FREE-ka ES-teh poo-ter-NEE-kuh

More approximately:

• Frica = FREE-ka
• este = ES-te
• puternică = pu-ter-NEE-kə

Stress:

• FRI-ca
• ES-te
• pu-ter-NI-că

So the strongest stress in the last word is on -ni-.

It can do either, depending on context.

1. General / abstract meaning
   In a sentence like Frica este puternică, it often means fear as an idea or force in general.

2. Specific meaning
   In another context, frica could mean the fear already mentioned before.

So Romanian definite forms can sometimes be used where English would simply use a bare abstract noun.

Usually no, not in the same general sense.

O frică means a fear, so it sounds like you are talking about one particular fear among others. That usually needs more context.

• Frica este puternică. = Fear is powerful. / Fear is strong.
• O frică este puternică. = A fear is powerful.
  This sounds incomplete or unusual unless the context makes it clear which fear you mean.

So for a general statement, Frica este puternică is the natural choice.

It can mean either powerful or strong, depending on context.

The base adjective puternic / puternică is very common and can describe:

• physical strength
• intensity
• power
• force

In this sentence, English might naturally use either:

• Fear is powerful
• Fear is strong

Often powerful sounds a little more idiomatic here, but both are understandable depending on the intended meaning.

Yes. It is a complete, grammatical, natural Romanian sentence.

It has everything it needs:

• a subject: Frica
• a verb: este
• an adjective describing the subject: puternică

It is simple, correct, and useful for learning several core Romanian patterns at once:

• the attached definite article
• the verb a fi
• adjective agreement with a feminine noun