riddah means apostasy. Lexicurio rates it Sui generis — a strength score of 100 out of 100.
Why “riddah” is a great word
RIDDAH — [Noun] In Islamic law, the deliberate act by which a Muslim renounces the faith. From Arabic رِدَّة (ridda, "apostasy, turning back"). Unlike *kufr*, which primarily denotes original unbelief, or *irtidad*, a near-synonym emphasizing the motion of turning away, *riddah* is the settled, classical term for the formal rupture itself. It is the tangible chill of a withdrawn hand during prayer, the scent of ink drying on a forced recantation, the profound silence where the shahadah once resided—a name for the void left behind when a world is voluntarily unmade.