One word for 'that which cannot be read' (illegible)

The same question, asked 2 times: 26 Jul 2023 S1*, 16 Sep 2025 S2. Every wording below, oldest first.

Try each one first, then open its answer.

Question 1
26 Jul 2023 S1
80 $Select the option that can be used as a one-word substitute for the given group of words. Which cannot be read.$
Tap an option to check your answer.
Question 2
16 Sep 2025 S2
83 $Choose the correct one-word substitute for: 'Something that is impossible to be read'.$
Tap an option to check your answer.