Learn Hardcore Hausa: Cunkoso ya jawo soke rajista. - Congestion caused the registration to be cancelled.

Cunkoso usually means congestion, crowding, or overcrowding. In different contexts it can refer to things like a traffic jam, a crowded place, or general congestion. Here it means the congestion/crowding that led to the next event.

Why is ya used after cunkoso?

Ya is the 3rd person masculine singular perfective marker. In Hausa, even when you already name the subject, you still normally use this subject marker before the verb.

So the pattern is:

Cunkoso + ya + jawo
congestion + it (masc.) + caused

Why is it ya and not ta?

Because cunkoso is treated as a masculine noun in Hausa. Hausa nouns have grammatical gender, so the subject marker has to agree with the noun’s gender.

ya = masculine singular
ta = feminine singular

This is grammatical gender, not biological gender.

What does jawo mean here?