Primaeval
Part of speech: adjective
Definition: Belonging to the first ages
Early
Part of speech: adjective
Definition: At a time in advance of the usual or expected event.Arriving a time before expected; sooner than on-time.Near the start or beginning.
Part of speech: adverb
Definition: At a time before expected; sooner than usual.
Example sentence: I think we consider too much the good luck of the early bird and not enough the bad luck of the early worm.