Synonym: reckless, sloppy, slovenly. Antonym: careful. Similar words: nonetheless, homeless, senseless, nevertheless, tactlessness, less, release, telescope. Meaning: ['keəlɪs] 
adj. 1. marked by lack of attention or consideration or forethought or thoroughness; not careful 2. effortless and unstudied 3. (usually followed by `of') without due thought or consideration.
adj. 1. marked by lack of attention or consideration or forethought or thoroughness; not careful 2. effortless and unstudied 3. (usually followed by `of') without due thought or consideration. 
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61. That shows a fairly careless attitude to clothes, doesn't it?
62. The affixes "un-"and"-less"are often used make negative words, such as unhappy or careless.
63. He had shown himself careless of personal safety where the life of his colleagues might be at risk.
64. He had been careless, and had done little to cover his tracks.
65. That brash boy has been careless enough to prang up his girlfriend.
66. My son's teacher says that his work is often rather careless.
67. It only takes one careless driver to cause an accident.
68. Careless spelling mistakes in a letter can create an unfavourable impression .
69. When performing his stunts he was notoriously careless of his own safety.
70. He failed his maths examination because of his careless work.
71. Boredom made him careless.
72. My son often makes careless mathematics mistakes by pointing off the wrong figures.
73. He was charged with careless driving and failing to report an accident.
74. He's careless with his glasses and has lost three pairs.
75. I tackled him about his careless work and frequent absences.
76. This is the kind of careless mistake on which examiners love to pounce.
77. It would be truer to say that he was careless than that he was unkind.
78. Mr Clarke had pleaded guilty to causing death by careless driving.
79. The teacher let that careless student off and didn't fail him.
80. He ran a hand through his hair with a careless gesture.
81. Our neighbour's a very careless bis driver; he never thinks about what he's responsible for.
82. He is always brushing her down for making careless mistakes.
83. They could not afford to spoil those maps by careless colouring.
84. The man so careless with rum and candles.
85. These people have become so careless.
86. Nor are undertakers alone in careless and callous behaviour.
87. I made a few careless mistakes.
88. She was impulsive,(http://sentencedict.com/careless.html) self-absorbed and careless about the future.
89. I am careless with that gun.
90. People get careless about mixing drink and pills.
More similar words: nonetheless, homeless, senseless, nevertheless, tactlessness, less, release, telescope, bless, relevant, unless, irrelevant, endless, much less, flawless, reckless, tactless, pointless, unrelentingly, tactlessly, no less than, regardless, more or less, irregardless, regardless of, sales, care, car, rely, flesh out.