Simple past tense and past participle of subject.(verb)
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Use "subjected" in a sentence
"The designation subjected them to substantial controls over their finances on the grounds that they were suspected of involvement in terrorism."
"While much of the shrinkage to which the planet has been subjected is due to the increased knowledge of mathematics and physics, an equal, if not greater, portion may be ascribed to the perfection of the means of locomotion and communication."
"And making it with such certitude bespeaks — to me, at least — evidence that “the educational system [to which the speaker was subjected] is fundamentally corrupt.”"