可读
kě​dú

readable (legible)

可读 可讀 kě​dú
readable (legible) adjective
easy or enjoyable to read; legible; worth reading

文字可以小到什么程度而仍能可读呢？

wén​zì kě​yǐ xiǎo dào shén​me chéng​dù ér réng néng kě​dú ne?

How small can the text be and still be readable?

readability
the quality of being easy to read or understand; comprehensibility
readable (computer data)
(of computer data) in a form that can be processed by a computer