KEY: Detect.
SYN: Discover, descry, unmask, expose.
ANT: Miss, lose, misobserve, ignore, connive.
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KEY: Detention.
SYN: Retention, retaining, hindrance.
ANT: Relinquishment, abandonment, letting go.
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KEY: Deter.
SYN: Warn, stop, dissuade, disincline, indispose, dispirit, hinder, prevent, discourage, dishearten, terrify, scare.