unprecedented

adjective10 collocationsAvg. frequency: 7.2
historically unprecedented7.9

Used to emphasize that something has never happened before throughout history.

almost unprecedented7.8
virtually unprecedented7.6
truly unprecedented7.5
quite unprecedented7.2
entirely unprecedented7.0
totally unprecedented6.8
by no means unprecedented6.0
hardly unprecedented5.8
be unprecedented8.5

Used to state that a situation or event has never happened or existed before.