1) to cast, throw
2) throw down
3) to cast forward or before
4) to set down (with the suggestion of haste and want of care)
5) to throw to the ground, prostrate
Part of Speech: verb
Citing in TDNT: 6:991,*
From a derivative of G4496; to toss up: - cast off.
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 ῥίπτεω; click on the second column to search for that grammatical form of the root ῥίπτεω; click on the third column to search for that word and grammatical form; click on the total to search for the root ῥίπτεω.