Можна програти.

Because this is an impersonal construction in Ukrainian: можна + infinitive.

It works like a general statement such as:

• It is possible to lose
• One can lose
• You can lose in a general, non-specific sense

So Ukrainian does not need a subject like я, ти, or ми here.

Можна can mean several related things, depending on context:

• it is possible
• one can
• it is allowed
• sometimes even may

In Можна програти, the most natural reading is usually general possibility: losing is possible.

Whether it means possible or allowed depends on the situation. With програти, the possible meaning is usually more likely than allowed.

Because after можна, Ukrainian normally uses the infinitive.

So the pattern is:

• можна + verb in infinitive

Examples:

• Можна піти — it is possible / allowed to go
• Можна виграти — it is possible to win
• Можна програти — it is possible to lose

This is similar to English can lose, where lose stays in its base form.

The difference is mainly personal vs. impersonal.

• Можна програти = a general statement
  It is possible to lose / One can lose

• Ти можеш програти = directed at a specific person
  You can lose / You might lose

So if you are warning someone directly, Ти можеш програти is more personal and direct.
If you are speaking more generally about the situation, Можна програти works well.

This is a question of aspect.

• програти = perfective
• програвати = imperfective

In broad terms:

• програти focuses on the completed result: ending up losing
• програвати focuses on the process, repetition, or habitual action

So Можна програти usually means that it is possible to end up losing.

If you used Можна програвати, it would sound more like it is possible to be losing / to lose repeatedly / to keep losing, depending on context, which is less likely here.

Yes.

Besides to lose, програти can also mean to play something back, especially with audio or media. For example:

• програти пісню — to play a song
• програти запис — to play a recording

But in the sentence Можна програти with no object, the most natural interpretation is usually to lose, especially in a context about games, competitions, arguments, or risky situations.

For a specific person, Ukrainian usually prefers a personal verb form:

• Я можу програти — I can / might lose
• Ти можеш програти — you can / might lose
• Він може програти — he can / might lose

Although можна can sometimes be used with a person in the dative case, that is much more common with ideas of permission:

• Мені можна зайти? — May I come in?

With програти, using personal forms like можу / можеш / може is usually more natural when you want to name the person.

This needs a little care.

If you say Не можна програти, it often sounds like:

• one must not lose
• it is not allowed to lose

That is because не можна very often expresses prohibition.

If you want to say it is impossible to lose, a clearer Ukrainian sentence is:

• Неможливо програти

So:

• Не можна програти = usually must not lose
• Неможливо програти = it is impossible to lose

The neutral word order is:

• Можна програти

But Ukrainian word order is flexible, so you can also hear:

• Програти можна

That version puts more emphasis on програти, often for contrast or style.

For example:

• Виграти важко, але програти можна швидко.
  Winning is hard, but losing can happen quickly.

So both are possible, but Можна програти is the most neutral default.

It is pronounced:

• мо́жна програ́ти
• roughly: MOZH-na pro-HRA-ty

A few useful pronunciation notes:

• ж sounds like the s in measure
• г in Ukrainian is usually /ɦ/, a softer sound than English hard g
• р is usually tapped or lightly rolled
• the stress falls on:
  • мо́жна
  • програ́ти

So the main stresses are on the first syllable of можна and the second syllable of програти.