transcription, транскрипция: [ ʌnsteɪb(ə)l ]
1.
You can describe something as unstable if it is likely to change suddenly, especially if this creates difficulty or danger.
After the fall of Pitt in 1801 there was a decade of unstable government...
The situation is unstable and potentially dangerous.
≠ stable
ADJ
2.
Unstable objects are likely to move or fall.
Both clay and sandstone are unstable rock formations.
≠ stable
ADJ
3.
If people are unstable , their emotions and behaviour keep changing because their minds are disturbed or upset.
He was emotionally unstable...
≠ stable
ADJ