Simple past tense and past participle of entrench.(verb)
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Use "entrenched" in a sentence
"Kenneth N. Luongo, president of the Partnership for Global Security, worried that the conference - the first of its kind - might prove to be long on hype and short on action, given what he called entrenched bureaucratic and technocratic interests and differing views on the urgency of the threat of nuclear terrorism."
"One side — composed primarily of those who have learned that flattering the wealthy and entrenched is a good-paying gig — rarely acknowledges the SEC possesses a mission."
"The last few spots of the loop where I'm entrenched is not ideal."