Usage Note
Minado is the past participle of minar used as an adjective. Literally it describes terrain that has been planted with mines ('campo minado' = minefield); figuratively, 'campo minado' is a very common idiom for a sensitive or treacherous situation. The figurative sense is probably more frequent in modern journalism than the literal one.
Examples
"El terreno estaba minado por explosivos."
Natural Translation
The terrain was mined with explosives.

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