1) a well
2) the pit of the abyss (because the nether world is thought to increase in size the further it extends from the surface of the earth and so resemble a cistern, the orifice of which is narrow)
Part of Speech: noun neuter
Of uncertain derivation; a hole in the ground (dug for obtaining or holding water or other purposes), that is, a cistern or well; figuratively an abyss (as a prison): - well, pit.
|b deep pit||1.58|
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 φρέαρ; click on the second column to search for that grammatical form of the root φρέαρ; click on the third column to search for that word and grammatical form; click on the total to search for the root φρέαρ.