1) to hold and treat as of no account, utterly to despise
2) to set at nought, treat with contempt
Part of Speech: verb
From G1537 and a derivative of the neuter of G3762; to make utterly nothing of, that is, despise: - set at nought. See also G1848.
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root ἐξουδενέω; click on the second column to search for that grammatical form of the root ἐξουδενέω; click on the third column to search for that word and grammatical form; click on the total to search for the root ἐξουδενέω.