Today's word is NIMIUS, which is a first-second declension adjective.
Latin meaning and usage: The basic meaning is "excessive" or "too much." The neuter form can also be used as a substantive, meaning "excess."
Latin word formation: The adverb is formed as nimio or nimium, and there is also a separate adverbial form, nimis. The word is formed from the negating prefix ni- (ne-) and the basic root that means "measure," as you see in words like metior and mensa.
English cognates and derivatives: As for as I know, we have no English derivatives from this word, but if someone can think of one, let me konw!
Here are some examples of today's word in Latin sayings and proverbs; for more information, see the page at the Scala Sapientiae, which also contains notes on some of the proverbs cited below, as well as additional proverbs:
Quod nimium est, fugito.
Omne nimium non bonum.
Nulli nimium credite.
Nihil nimium cupio.
Nil nimium cupito.
Nemini nimium bene est.
Qui nimium petit, nihil accipit.
Multi nimium habent, nemo satis.
Ne quid nimium.
Qui nimium petit, totum perdit.
Nil nimium cupias.
Qui nimium probat, nihil probat.
Non nimium curo.
Omne nimium vertitur in vitium.
Omne quod est nimium, vertitur in vitium.
Omne nimium nocet.
Omnia nimia nocent.
Omne nimium est naturae inimicum.