kamu

In Indonesian, choosing the right word for 'you' is a social skill. Kamu is the standard informal second-person pronoun. While the standalone word kamu remains the same whether it is the subject doing the action or the object receiving it, the pronoun has a suffix form -mu used for possession and objects.

1. Social Usage:
Use kamu when speaking to:

• Friends of a similar age.
• Children or younger siblings.
• People you are very close to (like a partner).

Avoid using kamu with teachers, bosses, elders, or strangers, as it may sound too familiar or even rude. In those cases, use Anda or Bapak/Ibu.

2. Polite Alternatives:
Even in informal settings, it is often more polite to use the person's name or a kinship title like Kak (older sibling/peer) or Dik (younger sibling) instead of kamu. This is a core part of pronoun register choices in Indonesian culture.

3. Plural Form (Kalian):
Kamu is generally a singular pronoun. To address a group, it is standard to use the plural pronoun kalian or the expanded forms kamu semua or kamu sekalian ("you all" or "you guys").

4. Regional, Slang, and Literary Variants:
In Jakarta and many urban areas, friends often use the slang terms lo or lu instead of kamu. Additionally, the word kau (short for engkau) is widely used in literature and songs. However, its use in everyday casual speech is restricted to certain regional dialects; in mainstream Indonesian (especially in Java and Jakarta), using kau casually can sound unnatural, overly dramatic, or rude. While slang terms are very common in casual conversation, they should be avoided in any formal context.

5. The Suffix Form (-mu):
Kamu often shortens to the suffix -mu. This is attached directly to the end of a noun to show possession (e.g., bukumu - your book). However, in everyday spoken Indonesian, using the full word kamu after a noun (e.g., buku kamu) is extremely common and perfectly acceptable. In highly colloquial speech, the possessive marker punya is also frequently used (e.g., kamu punya buku or buku punya kamu). The suffix is also attached to verbs as a direct object (e.g., melihatmu - see you) and to some prepositions as an object (e.g., untukmu - for you). Note that it cannot attach to spatial prepositions like di or ke; instead, you must use padamu or kepadamu in formal Indonesian. However, in casual spoken Indonesian, phrases like di kamu and ke kamu are extremely common.

6. Passive Construction:
In the second-person object voice, kamu is placed directly before the base verb (e.g., buku itu sudah kamu baca). In the formal object-voice model, kamu immediately precedes the base verb. Auxiliary words like sudah, akan, or tidak must be placed before kamu. Note that the suffix -mu cannot be used in this passive construction (e.g., buku itu sudah mu baca is incorrect); you must use the full word kamu. (The related pronoun engkau has a proclitic form kau- that attaches directly to the front of the base verb, e.g., buku yang kaubaca, but kamu does not have a prefix form).

7. Capitalization Rule:
Unlike the formal pronoun Anda, which is always capitalized regardless of its position in a sentence, kamu (and its related suffix -mu) is generally not capitalized unless it is the first word of a sentence. The important exception is when referring to God, where the suffix is capitalized as -Mu (e.g., Tuhan, rahmat-Mu).

8. Dropping the Pronoun:
In Indonesian, pronouns are frequently omitted when the context is clear. Dropping kamu entirely is very common and is often the most natural and polite choice in everyday conversation.