CARELESSLY
carelessly, heedlessly
(adverb) without care or concern; “carelessly raised the children’s hopes without thinking of their possible disappointment”
rakishly, raffishly, carelessly
(adverb) in a rakish manner; “she wore her hat rakishly at an angle”
incautiously, carelessly
(adverb) without caution or prudence; “one unfortunately sees historic features carelessly lost when estates fall into unsympathetic hands”
Source: WordNet® 3.1
Etymology
Adverb
carelessly (comparative more carelessly, superlative most carelessly)
Giving the appearance of carelessness; relaxedly.
Done without care or attention; inattentively.
Source: Wiktionary
Care"less*ly, adv.
Definition: In a careless manner.
CARELESS
Care"less, a. Etym: [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; spontaneouse; rash; as, a
careless throw; a careless expression.
He framed the careless rhyme. Beatie.
4. Not receiving care; uncared for. [R.]
Their many wounds and careless hatms. Spemser.
Syn.
– Negligent; heedless; thoughtless; unthinking; inattentive;
incautious; remiss; forgetful; regardless; inconsiderate; listless.
Source: Webster’s Unabridged Dictionary 1913 Edition