Mind'less, a.
a. 1. Not indued with mind or intellectual powers; stupid; unthinking; as, a mindless slave. Shak.
Sense 2. Unmindful; inattentive; heedless; forgetful; negligent; careless. “Cursed Athens, mindless of thy worth.” Shak.
Who, uninformed in such matters, and quite mindless as toward every form of gainsaying, are content to hold fast the “form of sound words” which they have been taught. I. Taylor.