Antonyms of legible :
Examples of usage:
The scattered ponds, and nearly northerly course, were legible proofs of its identity. "Journal of an Expedition into the Interior of Tropical Australia In Search of a Route from Sydney to the Gulf of Carpentaria (1848) by Lt. Col. Sir Thomas Livingstone Mitchell Kt. D.C.L. (1792-1855) Surveyor-General of New South Wales", Thomas Mitchell.
The " great love" of which he had spoken to Katharina was legible in every line of his letter, and any woman can forgive any man- were he a sinner, and a scarecrow into the bargain- for his audacity in loving her. "The Complete Historical Romances of Georg Ebers", Georg Ebers.
Perhaps Mr. Saunders writes so legible a hand that the printers are careless with his manuscript. "The Love Affairs of a Bibliomaniac", Eugene Field.