Synonym: crazy, deranged, foolish, mad, unbalanced. Antonym: sane. Similar words: insatiable, instantaneous, on sale, sand, sank, compensate, sensation, cane. Meaning: [ɪn'seɪn] 
adj. 1. afflicted with or characteristic of mental derangement 2. very foolish.
adj. 1. afflicted with or characteristic of mental derangement 2. very foolish. 
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61. The noise from the construction project is driving us completely insane.
62. I wondered if they were there to prevent jumpers, like in an insane asylum.
63. She had the insane desire to tell all that to this man, but she bit back the words.
64. The place where the criminally insane were kept under lock and key.
65. Paul must be insane, spending all that money on a boat.
66. Found something intriguing, improbable, insane or especially useful on the Net?
67. Their withdrawal, their separatism, was, they said, a sane response to an insane world.
68. Would it be totally insane of her to agree to his suggestion?
69. I wonder at what point in this insane course of tutorials did teacher and pupil begin taking snapshots of each other.
70. The white faces of saints had grown insane and bloated, their purity profaned.
71. Others, still living but insane, would be selected and flown up for further tests.
72. We don't punish people for crimes if they are insane, because we have decided that they can't help it.
73. She is obviously following this insane dialogue with remarkably close attention.
74. Can you imagine it(Sentence dictionary), to have grown up insane and then in one fell swoop to achieve sanity?
75. The Darkfall absorption in that Leeds factory didn't turn him completely insane like the others.
76. For some insane reason he decided to do the whole journey in one day.
77. The monotony of prison life is enough to drive anyone insane.
78. Of course, anyone forecasting such a scenario just five short years ago would have been certified completely insane.
79. When they see us paddling on the river, they stare at us open-mouthed, as if we are completely insane.
80. Those who dance are considered insane by those who cannot hear the music. George Carlin 
81. Their story plays out amid the insane violence of a repressive political regime.
82. It is quite insane to imagine that you are going to sit in a restaurant adding up calories and grams of fibre.
83. The jobs in the brave new workplace are tedious and drive people insane.
84. He was a great entertainer but going insane.
85. I said, "Listen, this is completely insane.".
86. While alone and insane incased in his tomb.
87. I'm sick of this whole insane and vile war.
88. When people kill without remorse, we call the insane.
89. For an instant he was insane, a screaming animal.
90. He was soon committed to an insane asylum.
More similar words: insatiable, instantaneous, on sale, sand, sank, compensate, sensation, cane, compensation, transaction, unsatisfied, commensalism, compensate for, dispensable, sandwich, sand dune, peasant, bane, lane, dispensation, condensation, sanguine, sandstorm, incessant, pleasant, chitosan, partisan, sanction, inane, panel.