nonus

Per- (prefix)

Definition: very -, - completely, - thoroughly

e.g. permultus = very much

Prae- (prefix)

Definition: pre-, before -, in front of -; forth; very -, - completely, - thoroughly;

e.g. praealtus = very high/deep

praecanus = prematurely grey

Sentence: Mare Atlanticum est praefrigidus persaepe

(et praefrigidissimus in hieme).

The Atlantic Ocean is very cold very often (and thoroughly the coldest in the winter).

Another sentence from Regulus: Sic in vita cum permultis gravibus viris persaepe congressus sum.

Thus in life I came together with very many serious men very often.

Notes: Using these prefixes on an adjective can be the equivalent of using the superlative of the adjective (though why an author would use these prefixes instead of the perfectly good superlative I do not know, at least in prose). They probably have different metrical qualities, so a poet might use these prefixes so that the word fits the meter.

N.B.: Some of these words that I am using, though they can be valid words, might not ever have been used by the Romans...