By calling in the matriarchal troops, Elin effectively changed the rules of the game.
Jane was raised in a matriarchal family by her hyper-religious grandma and young, aspiring singer single mother.
1780 (in reference to bee colonies); see matriarch + -al (1); "patterned after patriarchy" [Barnhart]. Related: Matriarchally.
"mother who heads a family or tribe," c.1600, from matri- + -arch, abstracted from patriarch.