Ka koma gida lafiya.

Ka is the 2nd-person singular subject marker for a male addressee (you, masculine). It commonly appears in commands, requests, and “wishing” expressions: ka + verb ≈ “(you should) … / may you …”.

It can function as either, depending on context and tone:

• As a direct instruction: Go back home safely.
• As a friendly send-off / wish: May you get home safely / Get home safe.
  Hausa often uses the same structure for both “command-like” and “wish-like” meanings.

Use the feminine singular marker ki:

• Ki koma gida lafiya.

Use the plural marker ku (also used as a respectful/polite you to one person):

• Ku koma gida lafiya. = “You all return home safely” / “Please return home safely.”

koma means to return / go back. In this sentence it’s the “go back (home)” idea, not just “go” in general.

• je = go (neutral “go”)
• t(a)fi = go / leave / depart
• koma = return / go back (implies you were there before or you’re heading back)

So Ka je gida is simply “Go home,” while Ka koma gida is “Go back home / Return home.”

Hausa can express destination without an explicit preposition. gida can behave like a destination noun on its own:

• Ka koma gida. = “Return home.”
  You can also be more explicit with something like zuwa (“to/towards”), but it’s often unnecessary in everyday speech.

Both. gida can mean:

• house/building
• home (the place you belong/live)
• sometimes even “household/family” depending on context
  Here, it’s best understood as home.

Literally lafiya means health / well-being, but it’s very commonly used in Hausa to express “being okay” and can work adverbially as safely / without harm / in good condition.
So gida lafiya conveys “home safely.”

Yes. lafiya is central to Hausa greetings (asking about someone’s well-being), e.g., “How is your health/are you okay?”
That same core meaning (“well-being”) is what makes it work naturally as “safely/okay” in send-offs like Ka koma gida lafiya.

Yes. Koma gida lafiya. is a normal, direct imperative: “Go back home safely.”
Including ka can feel a bit more explicit and can also fit a “wish/blessing” tone: “May you return home safely.”

It’s essentially:

• Subject marker (you)
  • verb
    • destination (home)
      • manner (safely)
        So: Ka
        • koma
          • gida
            • lafiya.