1. A way of living characterized by lack of permanence, security, or predictability; frequent changes in residence, employment, relationships, or circumstances
After losing his job, he found himself living an unstable life, moving from place to place.
Após perder o emprego, ele se viu vivendo uma vida instável, mudando-se de um lugar para outro.
2. A lifestyle marked by emotional or psychological turbulence and uncertainty
Her unstable life was reflected in her constant mood swings and relationship problems.
Sua vida instável era refletida em suas mudanças de humor constantes e problemas relacionais.