Illegible
/ˌɪˈlɛdʒəbəl/
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Definition
(adj) Not clear enough to be read; unreadable; not legible or decipherable.
Sentence Examples
A terrible, almost illegible scrawl.
The last two lines of the document are mostly illegible.
CEFR Practice Quiz
His messy handwriting was practically ____, and his teacher found it very hard to grade.