So extraordinary or extreme that there is no earlier example or comparison for it; unmatched, unique.
example
Der Erfolg des Films war beispiellos und brach alle Kassenrekorde.
The film's success was unprecedented and broke all box office records.
Usage tips
Word structure
The word is made up of 'Beispiel' (example) and the ending '-los' (-less). The ending '-los' means 'without', similar to '-less' in English. 'Beispiellos' (unprecedented) therefore literally means 'without example'.
EXAMPLE
Die Hilfsbereitschaft der Menschen nach der Katastrophe war beispiellos.
People's willingness to help after the disaster was unprecedented.
Register and style
'Beispiellos' (unprecedented) is a strong and expressive word. It is used to emphasize the extreme uniqueness of something, whether positive or negative. It is found more often in written language than in everyday conversation.
EXAMPLE
Die Geschwindigkeit des technologischen Wandels ist in der Menschheitsgeschichte beispiellos.
The speed of technological change is unprecedented in human history.
Typical collocations
The adjective often describes nouns that have a large scale or dimension. Typical combinations are 'ein beispielloser Erfolg' (an unprecedented success), 'eine beispiellose Krise' (an unprecedented crisis), 'ein beispielloser Anstieg' (an unprecedented increase), or 'eine beispiellose Karriere' (an unprecedented career).
EXAMPLE
Die Dürre führte zu einer beispiellosen Wasserknappheit in der Region.
The drought led to an unprecedented water shortage in the region.
Compare with
antonym
beispiellos vs gewöhnlich
ordinary / usually
'gewöhnlich' and 'beispiellos' are opposites. 'gewöhnlich' describes something ordinary that you know and often experience. 'beispiellos' describes something so extraordinary or extreme that there is no suitable earlier example for it. 'gewöhnlich' fits everyday life and routine. 'beispiellos' is much stronger and is used when something is truly unique or very extraordinary.
beispiellos
Die Hilfe der Nachbarn nach dem Sturm war beispiellos.
The neighbors' help after the storm was unprecedented.
gewöhnlich
Beim Arzt war die Untersuchung ganz gewöhnlich und schnell vorbei.
At the doctor's, the examination was completely ordinary and over quickly.