"less mwɑ̃ trɑ̃kil"
Here's a breakdown:
* Laisse: "less" (the "s" is silent)
* moi: "mwɑ̃" (pronounced like "mwa" but with a slightly nasal sound)
* tranquille: "trɑ̃kil" (the "l" is silent)
Let me know if you'd like to hear it spoken! You can find audio pronunciations online or use a language learning app.