Made of adamant, or having the qualities of adamant; incapable of being broken, dissolved, or penetrated.
adamantine bonds adamantine chains
1984, Gayle Rubin, "Thinking Sex" in Carole S. Vance, Pleasure and Danger: Exploring Female Sexuality (Boston: Routledge and Kegan Paul), 267-319.
Sex law is the most adamantine instrument of sexual stratification and erotic persecution.