What does creperum mean in Latin?

creperum, a noun, means “The meaning of this term is uncertain. Possibilities include: obscurity, doubt, darkness”.

What is the genitive of creperum?

The genitive singular is creperī. creperum is neuter, second declension.

In classical Latin, [ˈkrɛ.pɛ.rũː]; in ecclesiastical (church) Latin, [ˈkrɛː.pe.rum].

noun · neutersecond declension

creperum n (genitive creperī)

Classical[ˈkrɛ.pɛ.rũː]Ecclesiastical[ˈkrɛː.pe.rum]

neuterThe meaning of this term is uncertain. Possibilities include: obscurity, doubt, darkness
Secundum hoc dicitur crepusculum a crepero: id vocabulum sumpserunt a Sabinis, unde veniunt Crepusci nominati Amiterno, qui eo tempore erant nati, ut Lucii prima luce in Reatino; crepusculum significat dubium; ab eo res dictae dubiae creperae, quod crepusculum dies etiam nunc sit an iam nox multis dubium.116 BCE – 27 BCE, Marcus Terentius Varro, De Lingua Latina 6.5
Crepusculum est dubia lux. Nam creperum dubium dicimus, hoc est inter lucem et tenebras.Isidore of Seville, Etymologiarum libri XX 5.31.6

Related to creper (“dusky, dark”). Varro suggests the term was borrowed from Sabine.