Na lura cewa kuɗi sun ɓace daga aljihuna.

Na is the 1st-person singular subject pronoun used with the perfective/completed aspect in Hausa. In this sentence it pairs naturally with lura to mean something like I noticed / I realized (a completed act of noticing).

lura is a verb meaning to notice / to realize / to observe.

• na lura = I noticed / I realized (completed)
• ina lura = I notice / I am noticing (ongoing/habitual, depending on context)
• zan lura = I will notice / I’ll pay attention

cewa introduces a content clause, like English that: I noticed that …
It’s very common and often preferred for clarity. In some casual contexts, speakers may omit it, but cewa is the safe, standard way to link the two parts.

Because sun is the 3rd-person plural perfective marker, and kuɗi (money) is commonly treated as plural/countable in agreement (like monies conceptually). So:

• kuɗi sun ɓace = the money disappeared / the money is missing
  Some speakers might sometimes treat certain mass nouns differently, but sun with kuɗi is very normal.

sun is a subject marker for 3rd-person plural in the perfective/completed aspect. It often corresponds to they in English, but in Hausa it also functions as the grammatical piece that carries subject+aspect information before the verb:

• sun ɓace = they disappeared / have disappeared

ɓace means to get lost / to disappear / to go missing.
The letter ɓ is a distinct Hausa consonant (an implosive b sound), not the same as plain b. The spelling matters: ɓ and b are different sounds and can distinguish words.

ɗ is another distinct Hausa consonant (an implosive d sound), different from English d. It’s pronounced with a kind of inward “suction” while making a d-like sound. So kuɗi is not pronounced like English kudi.

daga means from/out of and marks the source location. Here it indicates the place the money is missing from:

• daga aljihuna = from my pocket

aljihuna = aljihu (pocket) + na (my).
In Hausa, possession is often expressed as noun + possessive pronoun. With many nouns, especially in fast/normal speech and writing, the two parts commonly contract into one word:

• aljihu na → aljihuna = my pocket
  You’ll see similar patterns:
• aljihunsa = his pocket
• aljihunki = your (f.) pocket
• aljihunku = your (pl.) pocket

Hausa doesn’t map perfectly onto English tense labels. The form used here (perfective/completed) commonly corresponds to:

• simple past: I noticed…
• present perfect: I’ve noticed… Context decides which English tense feels best. If you want to force a time interpretation, you add time words (like yau, jiya, etc.).

Hausa generally doesn’t use articles like English the/a. Definiteness is usually understood from context or shown with other devices (like demonstratives, tone in speech, or additions such as nan in some contexts). So kuɗi can be understood as the money or money depending on context.

kuɗin is typically kuɗi + -n in a genitive/linking role (often used before another noun), like money of… or the money (linked to something):

• kuɗin mota = the car’s money / money for the car
  In your sentence, kuɗi stands alone as the subject, so kuɗi (not kuɗin) is the normal form.