Special Words in Hafs — "Al-Dhaf", "Bastah", and "Siraat"

The Issue of "Al-Dhaf" / "Al-Dhuf":
In Surah Al-Rum (verses 54) the word appears three times. Hafs has two readings: "Al-Dhaf" with fatha on the dhad, and "Al-Dhuf" with dhamma. The well-known Shatibiyya route uses fatha: "Al-Dhaf."

The Issue of "Bastah" (Al-Araf: 69):
"Wa zaadakum fi al-khalqi bastatan" — written with saa in Uthmani script even though its root is "bastah" with seen. Hafs reads it with saa following the script. In Al-Baqarah (247) the word "bastah" is written with seen and Hafs reads it with seen accordingly.

The Issue of "Siraat" / "Al-Siraat":
Hafs reads "Siraat" and "Al-Siraat" with a pure saa everywhere — not seen. This differs from Qunbul and Khallad who blend it with zayn.

Benefit:
Knowing these special words protects the reader from mixing narrations — reading each riwaya purely as transmitted.