Detectivul găsește cheia.

Because Romanian usually puts the definite article at the end of the noun, not before it.

• detectiv = detective
• detectivul = the detective

So -ul here is the masculine singular definite article, equivalent to English the.

This is one of the first big differences English speakers notice in Romanian:

• English: the detective
• Romanian: detectivul

For the same reason: it is also a definite noun.

• cheie = key
• cheia = the key

With many feminine singular nouns, the definite article appears as -a attached to the noun. In this case, the noun changes slightly when the article is added:

• cheie → cheia

So the sentence has both nouns marked as definite:

• detectivul = the detective
• cheia = the key

Because Romanian normally uses a postposed definite article—that means the article is attached to the end of the noun.

Compare:

• English: the detective finds the key
• Romanian: detectivul găsește cheia

So instead of a separate word like English the, Romanian builds the definiteness into the noun itself.

găsește is the 3rd person singular present tense of the verb a găsi (to find).

So it means:

• he finds
• she finds
• it finds

In this sentence, the subject is detectivul, so:

• Detectivul găsește cheia. = The detective finds the key.

A few related forms:

• eu găsesc = I find
• tu găsești = you find
• el/ea găsește = he/she finds

Mostly from word order and meaning.

In the neutral Romanian order, the sentence goes:

• subject + verb + object

So:

• Detectivul = subject
• găsește = verb
• cheia = object

Romanian does have case distinctions, but in a sentence like this, the direct object often looks the same as the subject form. So an English speaker should first rely on:

1. normal word order
2. context
3. meaning

Here, the natural reading is:

• The detective finds the key

not

• The key finds the detective

Not in any very obvious way here. In this sentence, cheia is the direct object, but its form is also the normal definite singular form of cheie.

So:

• cheia can be understood as the key
• in this sentence, it functions as the object because of its position after the verb

This is different from languages where object nouns always take a clearly different ending. Romanian sometimes marks case more clearly, but not always in simple direct-object sentences like this one.

You would usually say:

Un detectiv găsește o cheie.

Breakdown:

• un detectiv = a detective
• găsește = finds
• o cheie = a key

So the contrast is:

• Detectivul găsește cheia. = The detective finds the key.
• Un detectiv găsește o cheie. = A detective finds a key.

The dictionary forms are:

• detectiv = detective
• a găsi = to find
• cheie = key

The sentence uses inflected forms:

• detectivul from detectiv
• găsește from a găsi
• cheia from cheie

This is useful because Romanian dictionaries usually list verbs under the infinitive with a:

• a găsi

and nouns without the attached definite article:

• detectiv
• cheie

A rough pronunciation is:

• găsește ≈ guh-ZESH-teh

The special letters are important:

• ă = a short central vowel, something like the a in sofa for many English speakers
• ș = sh as in shoe

So:

• găsește sounds approximately like guh-ZESH-teh

The stress is on the middle syllable:

• gă-SEȘ-te

A rough English-friendly pronunciation is:

deh-tek-TEE-vul guh-ZESH-teh KAY-a

More carefully:

• Detectivul = deh-tek-TEE-vul
• găsește = guh-ZESH-teh
• cheia = KAY-a

A few notes:

• ch before e sounds like k, not like English ch
• so cheia starts with a k sound
• cheia is pronounced roughly KAY-a

Yes, Romanian word order is fairly flexible, but Detectivul găsește cheia is the most neutral and straightforward order.

This version simply states the fact:

• The detective finds the key.

Other orders are possible for emphasis, but they may sound marked or contrastive. For example, moving cheia earlier could emphasize the key specifically.

For a learner, the safest pattern is:

• subject + verb + object

So this sentence is a very good basic model.

Because in Romanian, ch before e or i is used to keep the hard k sound.

So:

• cheie
• cheia

both begin with k, not English ch.

This spelling rule helps Romanian distinguish:

• a soft sound that c might otherwise have before e/i
• from the hard k sound it wants here

So cheia is roughly:

• KAY-a

not

• CHAY-a

Yes, it is in the present tense.

găsește most directly means:

• finds

Depending on context, Romanian present tense can sometimes overlap with English is finding, but in a simple sentence like this, the most natural translation is just:

• The detective finds the key.

If there is no special context, English simple present is the best match.