Unprecedented

1.

(For which there is no precedent, unparalleled) ដែលមិនឮ, ដែលអស្ចារ្យ
Example: On an unprecedented scale, an unprecedented amount of income.

2.

(បច្ចេកទេស) ដែលពុំធ្លាប់មានពីមុនមក

1.

Having no precedent or example; not preceded by a like case; not having the authority of prior example; novel; new; unexampled.