STABILITY Copy link • STABILITYPROP., firmitas: firmitudo (firmness): stabilitas (power of standing firmly or steadily, Caes.). To give stability to, confirmare, firmare. Figuratively, firmitas: stabilitas: constantia (opposed to mobilitas): gravitas (opposed to levitas). Stability of character, animi constantia propositique tenacitas (Eichst.). Not to possess stability of character, non satis firma animi constantia munitum esse.