Webster’s Revised Unabridged Dictionary · 1913
Careless
Care′less (kâr′lĕs), a. [AS. cearleás.] 1. Free from care or anxiety. hence, cheerful; light-hearted. Spenser.
Sleep she as sound as careless infancy. Shak.
2. Having no care; not taking ordinary or proper care; negligent; unconcerned; heedless; inattentive; unmindful; regardless.
My brother was too careless of his charge. Shak.
He grew careless of himself. Steele.
3. Without thought or purpose; without due care; without attention to rule or system; unstudied; inconsiderate; spontaneous; rash; as, a careless throw; a careless expression.
He framed the careless rhyme. Beattie.
4. Not receiving care; uncared for. [R.]
Their many wounds and careless harms. Spenser.
Syn. — Negligent; heedless; thoughtless; unthinking; inattentive; incautious; remiss; supine; forgetful; regardless; inconsiderate; listless.