He invented a machine which so supported his hand that he could write legibly with closed eyes.
When completing application materials, write as legibly as possible.
compressed gas cylinder for use that does not legibly identify its contents by name.
Write the shipping address neatly and legibly, or for the most professional look, print a shipping label.
His eyesight failed him completely in 1771, but he contrived an ingenious apparatus which enabled him to write so legibly that the result could easily be transcribed by his daughter.