unceasable
/ˈənsɪˈeɪsəbəl, ˈʌnsɪˈeɪsəbəl/Definitions
1. adjective
Impossible to satisfy or appease; unappeasable.
“The dictator’s demands were deemed unceasable, causing global concern.”
2. adjective
Difficult to control or satisfy, especially because of being extremely strong or persistent.
“Her unceasable curiosity drove her to explore every nook and cranny of the abandoned house.”