неустойчивость angolul

fluctuation [fluctuations]▼(wavering; unsteadiness)
noun
[UK: ˌflʌk.tʃʊ.ˈeɪʃ.n̩] [US: ˌflʌk.tʃuː.ˈeɪʃ.n̩]

instability [instabilities]▼(quality of being unstable)
noun
[UK: ˌɪn.stə.ˈbɪ.lɪ.ti] [US: ˌɪn.stə.ˈbɪ.lə.ti]

unsteadiness▼(the state of being unsteady)
noun
[UK: ʌn.ˈste.di] [US: ʌn.ˈste.di]