unstable

instabile

Può muoversi, cadere, cedere o cambiare improvvisamente perché manca di solidità o sicurezza.

In inglese semplice: Likely to move, fall, fail, or change suddenly because it is not firm or secure.

• This chair is unstable.
• The house stood on unstable ground.
• Engineers warned that the damaged bridge was unstable.

Sinonimi: unsteady, insecure

Contrari: stable, steady

Espressioni comuni: unstable ground, unstable structure, unstable ladder

instabile, variabile

Cambia spesso o all’improvviso invece di rimanere uguale.

In inglese semplice: Changing often or suddenly rather than staying the same.

• Fuel prices are unstable.
• The country remained politically unstable for years.
• Unstable weather made it difficult to plan the trip.

Sinonimi: changeable, volatile

Contrari: stable, constant

Espressioni comuni: unstable prices, politically unstable, unstable economy

instabile

Si decompone facilmente o si trasforma in altre sostanze attraverso cambiamenti chimici.

In inglese semplice: Likely to break down chemically or change into other substances easily.

• The compound is chemically unstable.
• Heat can make this substance unstable.
• Unstable molecules may break apart during storage.

Contrari: stable

Espressioni comuni: chemically unstable, unstable compound, unstable molecule