unpredictable

unpredictable /ˌʌnprɪˈdɪktəbəl/ adjective
unpredictable
/ˌʌnprɪˈdɪktəbəl/
adjective
Britannica Dictionary definition of UNPREDICTABLE
[more unpredictable; most unpredictable]
: not predictable: such as
a  : not capable of being known before happening or being done
b  : not always behaving in a way that is expected

— unpredictability

/ˌʌnprɪˌdɪktəˈbɪləti/ noun [noncount]

— unpredictably

/ˌʌnprɪˈdɪktəbli/ adverb