Suflör ilk repliği fısıldadı.

Because replik is taking the definite direct object ending -(y)i, and that changes its form.

Breakdown:

• dictionary form: replik
• with accusative: replik + i
• because final k often softens before a vowel-initial ending, k → ğ
• so it becomes repliği

This is a very common pattern in Turkish:

• kitap → kitabı
• renk → rengi
• köpek → köpeği

So repliği means the line / the cue line as a specific object.

That -i is the accusative case ending, used for a specific / definite direct object.

In this sentence, the speaker is not whispering just any line, but the first line, a specific one. So Turkish marks it:

• ilk replik = a first line / first line in a more general sense
• ilk repliği = the first line as a specific object

This is one of the most important differences from English. English uses word order and articles; Turkish often uses case endings.

İlk means first. It is an adjective modifying replik.

Turkish adjectives do not change form for:

• singular/plural
• gender
• case

So ilk stays ilk no matter what noun follows it:

• ilk replik
• ilk repliği
• ilk replikler
• ilk replikleri

Unlike in some languages, Turkish adjectives are very simple in this way.

Fısıldadı is in the simple past tense (often called the definite past in Turkish grammar).

Breakdown:

• fısılda- = the verb stem, to whisper
• -dı = past tense ending

So:

• fısıldadı = he/she/it whispered

Turkish does not need a separate word for he, she, or it here. The subject can be understood from context, or stated explicitly, as it is here with Suflör.

Because the most neutral Turkish word order is Subject – Object – Verb.

This sentence follows that pattern:

• Suflör = subject
• ilk repliği = object
• fısıldadı = verb

So:

• Suflör ilk repliği fısıldadı.

That said, Turkish word order is fairly flexible. Other orders are possible for emphasis, but the verb often still comes last in neutral statements.

It is a loanword, ultimately from French. In Turkish, suflör refers to a theatrical prompter: someone who quietly feeds lines to an actor.

Even though it is borrowed, it behaves like a normal Turkish noun in sentences.

Its spelling also includes ö, which is a common Turkish vowel.

Roughly like su-flor, but with a Turkish ö sound at the end.

A few pronunciation notes:

• u = like the u in put, not like you
• ö = like the vowel in German schön or French peu; English does not have an exact match
• final r is pronounced, though often lightly

So a rough guide is:

• suf-LÖR

Turkish does not have a direct equivalent of English the.

It can use:

• bir for a/an
• case marking and context for definiteness

In this sentence, definiteness is shown mainly by the accusative ending on repliği:

• ilk repliği = the first line

If you wanted something more like a line, you would often leave off the accusative:

• bir replik fısıldadı = he/she whispered a line

So Turkish handles articles very differently from English.

Yes. In Turkish, fısıldamak can be used transitively, just like English whisper in sentences such as whisper a word or whisper the answer.

Here it takes a direct object:

• ilk repliği fısıldadı = whispered the first line

You can also use it without an object if the content is not mentioned:

• Suflör fısıldadı. = The prompter whispered.

So both patterns are possible.

Because Turkish often leaves pronouns out when they are not necessary.

The subject is already stated:

• Suflör

And even without that noun, the verb form can often carry enough information in context. Turkish is a pro-drop language, meaning subject pronouns are often omitted when they are understood.

So Turkish avoids repeating pronouns more than English does.

That is a useful literal breakdown for learning the structure:

• Suflör = prompter
• ilk = first
• repliği = the line / the cue line (object-marked)
• fısıldadı = whispered

So yes, a very literal gloss would be something like:

• Prompter first line-ACC whispered

But the natural English translation is:

• The prompter whispered the first line.

Literal glosses are helpful for seeing Turkish grammar, even when the final English translation is smoother.