J’essaie d’enlever le pli de mon chemisier.

Because je is shortened to j’ before a vowel sound.

• je
  • essaie becomes j’essaie
• This is called elision
• French does this often for smoother pronunciation:
  • j’aime
  • j’habite
  • j’ouvre

So J’essaie simply means I am trying.

Essaie is the 1st person singular present tense form of essayer (to try).

So:

• j’essaie = I try / I’m trying
• tu essaies
• il/elle essaie

With essayer, you may also see spellings like j’essaye. Both are accepted in many contexts, but j’essaie is very common.

Because essayer is commonly followed by de + infinitive.

So the pattern is:

• essayer de faire quelque chose = to try to do something

In this sentence:

• j’essaie d’enlever = I’m trying to remove

The de becomes d’ before enlever because enlever begins with a vowel.

In standard French, essayer de + infinitive is the safer and more common structure.

So:

• j’essaie d’enlever = standard and natural

You may sometimes encounter essayer + infinitive without de, especially in informal usage or in some modern contexts, but learners should generally use essayer de.

Here, enlever means to remove.

It is a very common verb with several meanings depending on context, such as:

• remove
• take off
• pick up
• sometimes even kidnap in other contexts

In this sentence, it clearly means remove:

• enlever le pli = remove the crease/wrinkle

Le pli literally means the fold or the crease.

With clothing, it often refers to:

• a crease
• a wrinkle
• a fold line in the fabric

So in this sentence, le pli is the wrinkle or crease in the blouse.

Both could be possible, but they mean slightly different things.

• le pli = the crease
• un pli = a crease

Using le suggests the speaker has a specific crease in mind, probably one already visible on the blouse.

French often uses the definite article when referring to something specific in the situation, even if English might sometimes choose a.

Because French uses enlever quelque chose de quelque chose for remove something from something.

So the structure is:

• enlever le pli de mon chemisier
• literally: remove the crease from my blouse

Here:

• le pli = the thing being removed
• de mon chemisier = where it is being removed from

Because with enlever, French usually uses de to mark the source or place something is removed from.

So:

• enlever le pli de mon chemisier = natural
• sur mon chemisier would sound less idiomatic here

French is thinking more like:

• remove the crease from the blouse

not:

• remove the crease on the blouse

Even though English might use either wording depending on style.

Yes. Chemisier is a masculine noun in French:

• un chemisier
• mon chemisier

Even though it refers to a blouse, which English speakers may not expect to be masculine, grammatical gender in French does not always match real-world gender.

So:

• mon chemisier = my blouse

Yes, chemisier is a common word for a blouse, especially a blouse in a somewhat classic or standard sense.

Depending on context, French can also use other clothing words, but chemisier is perfectly normal here.

It is worth remembering that:

• une chemise = a shirt
• un chemisier = a blouse

Even though those words look related, they are different nouns with different genders.

Both are possible translations of the French present tense, but in this context I’m trying to remove the crease from my blouse sounds more natural.

That is because the French present tense often covers both:

• I try
• I am trying

Here, the action feels like something happening now, so I’m trying is usually the best choice.

A simple approximate pronunciation for English speakers is:

zhess-eh dahn-luh-vay luh plee duh mohn shuh-mee-zee-ay

A few helpful points:

• j’ sounds like the s in measure
• essaie sounds roughly like eh-say
• enlever has a nasal sound in en
• pli sounds like plee
• chemisier ends with a sound like zee-ay

If you want to sound more natural, focus especially on saying it smoothly as one rhythm group rather than word by word.

Yes. A French speaker might also say things like:

• J’essaie d’enlever ce pli de mon chemisier.
  = I’m trying to remove this crease from my blouse.

• J’essaie de défroisser mon chemisier.
  = I’m trying to get the wrinkles out of my blouse.

• J’essaie de faire partir le pli de mon chemisier.
  = I’m trying to get the crease out of my blouse.

Your original sentence is grammatically correct and natural. These are just alternative ways to express a similar idea.