Particles and interjections are small words or phrases that add nuance, emotion, or structure to sentences, but often don't fit neatly into other grammatical categories.

Particles (Edatlar / Belirteçler - some overlap with postpositions):

Particles are function words that modify other words or phrases, or indicate a specific grammatical relationship. Some words considered postpositions can also act as particles depending on context.

• de / da (also, too, even; but, and then): Written separately. Follows A-type vowel harmony.
  Example: Ben de geldim. (I came too.) Kitabı okudu da anlamadı. (He read the book but didn't understand.)
• ki (that, which; so ... that; I wonder if): Written separately. Does not always follow vowel harmony (usually ki, but can be kü in çünkü).
  Example: Biliyorum ki gelecek. (I know that he will come.) Evde mi ki? (I wonder if he's at home?)
• mi / mı / mu / mü (question particle): Used to form yes/no questions. Written separately.
  Example: Geldin mi? (Did you come?)
• ise (as for, if it is, whereas): Often suffixed as -(y)se/-(y)sa.
  Example: Ben çalışıyorum, kardeşim ise uyuyor. (I am working, whereas my sibling is sleeping.)
• bile (even):
  Example: O bile geldi. (Even he came.)
• sadece / yalnız / ancak (only, just):
  Example: Sadece sen anlarsın. (Only you would understand.)

Interjections (Ünlemler):

Interjections are words or short phrases used to express sudden feelings, emotions, or reactions. They often stand alone or at the beginning of a sentence, followed by an exclamation mark.

• Ah!: Expresses pain, sadness, longing. (Ah, başım ağrıyor! - Oh, my head hurts!)
• Eyvah!: Expresses alarm, dismay, pity. (Eyvah, anahtarı unuttum! - Oh no, I forgot the key!)
• Aferin!: Well done! Bravo! (Aferin sana! - Well done you!)
• Bravo!: Bravo! (Borrowed)
• Haydi!: Come on! Let's go! (Haydi gidelim! - Let's go!)
• Aman!: Oh dear! Good heavens! (can express surprise, warning, annoyance, or pleading) (Aman dikkat et! - Be careful!)
• Of!: Expresses boredom, annoyance, pain. (Of, çok sıkıldım! - Ugh, I'm so bored!)
• Yaşasın!: Hooray! Long live! (Yaşasın, kazandık! - Hooray, we won!)
• Merhaba!: Hello!
• Hoşça kal / Hoşça kalın!: Goodbye (said by the one leaving).
• Güle güle!: Goodbye (said by the one staying).

These words add color and emotion to spoken and written Turkish.