unstable

Not firm or steady and likely to move or fall.

• The bridge felt unstable after the earthquake.
  Depremden sonra köprü sağlam değilmiş gibi geldi.
• Don't stand on that chair; it's unstable.
  O sandalyeye çıkma, sağlam değil.

Likely to change suddenly, especially to become worse.

• He has an unstable job in the entertainment industry.
  Eğlence sektöründe istikrarsız bir işi var.
• The weather has been very unstable this week.
  Bu hafta hava çok değişkendi.

Having moods or behaviour that change suddenly and unpredictably.

• After the accident, he became emotionally unstable.
  Kazadan sonra duygusal açıdan dengesiz biri oldu.
• The main character is an unstable man who trusts nobody.
  Ana karakter, kimseye güvenmeyen psikolojik olarak dengesiz bir adam.