Too dreadful or disastrous to imagine; unthinkable.
未来情况不能想象。指预料事情会发展到很坏的地步。
清·曾国藩《复吴南屏书》纵使十次速灭，而设一次迁延，则桑梓之患，不堪设想。”
The consequences of a nuclear war are unthinkable.
Learn the next connected idiom: 不堪设想 (bù kān shè xiǎng) → 想入非非 (xiǎng rù fēi fēi)
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