IPA: /ɪnˈtrɛntʃ/
KK: /ɪnˈtrɛnʧ/
To establish something firmly or securely, often in a way that makes it difficult to change or remove.
The new policies will intrench the company's position in the market.
Past: intrenched
Past Participle: intrenched
Intrench is formed from "in-" (meaning in or into) and "trench" (from Old French *trenchier*, meaning to cut or to carve). The word describes the act of cutting or carving into something, often to create a defensive position or to establish a boundary.
Think of 'cutting into' ('trench') something 'in' ('in-') — that's why intrench means to establish a strong position.