Стегно сильне.

In Ukrainian, the verb to be is usually left out in the present tense.

So:

• Стегно сильне = The thigh is strong
• literally, it looks more like Thigh strong

This is completely normal Ukrainian.
If you want past or future, then forms of бути appear more clearly:

• Стегно було сильне = The thigh was strong
• Стегно буде сильне = The thigh will be strong

Ukrainian has no articles like English a/an/the.

So стегно can mean:

• a thigh
• the thigh

Which one is meant depends on context.

That is very common in Ukrainian, so learners have to get used to understanding definiteness from the situation rather than from a separate word.

Because the adjective has to agree with the noun.

The dictionary form is:

• сильний = strong (masculine singular)

But стегно is a neuter singular noun, so the adjective changes to the neuter singular nominative form:

• masculine: сильний
• feminine: сильна
• neuter: сильне
• plural: сильні

So:

• стегно сильне = correct
• стегно сильний = incorrect

A very common clue is the ending.

Many Ukrainian neuter nouns end in:

• -о
• -е

Since стегно ends in -о, it is very likely neuter.
That is why it takes the neuter adjective сильне.

Of course, there are exceptions in Ukrainian, but for a beginner this is a very useful rule of thumb.

Both words are in the nominative singular.

• стегно is the subject-like noun
• сильне is a predicate adjective agreeing with it

So this sentence uses the basic dictionary-style forms:

• стегно = nominative singular
• сильне = nominative singular neuter

This is one reason the sentence is a nice beginner example: it shows simple agreement without extra case changes.

A rough pronunciation guide is:

• стегно ≈ steh-HNO
• сильне ≈ SYL-ne

A few helpful details:

• The stress in стегно is on the last syllable: стегНО
• The stress in сильне is on the first syllable: СИЛьне
• Ukrainian г is usually not a hard English g. It is closer to a voiced h sound.
• The ль in сильне is a soft l
• The vowel и in сильне is not English ee; it is a different Ukrainian vowel

Yes, but it is usually understood differently.

• Стегно сильне = a full sentence: The thigh is strong
• Сильне стегно = usually a noun phrase: a strong thigh

So if you want a clear sentence meaning The thigh is strong, Стегно сильне is the better choice.

Ukrainian word order is flexible, but changing the order can change what sounds like a sentence and what sounds like just a phrase.

In most everyday contexts, стегно means thigh.

Depending on context, especially in anatomy or translation, learners may see slightly different English renderings involving the upper leg area. But thigh is the most straightforward meaning to learn first.

So if you are a beginner, it is safest to remember:

• стегно = thigh

Grammatically, yes — it is completely correct.

In real life, though, it is a bit context-dependent, because people do not often say The thigh is strong all by itself unless they are talking about:

• anatomy
• fitness
• injury recovery
• physical evaluation
• description of body strength

So it is a good grammar example, even if it is not the most common everyday sentence.

It teaches a very common Ukrainian pattern:

[noun] + [adjective]

with:

• no present-tense is
• adjective agreement in gender, number, and case

So from Стегно сильне, you can build similar sentences:

• М’яз сильний = The muscle is strong
• Нога сильна = The leg is strong
• Тіло сильне = The body is strong

This is a very useful pattern to memorize early.