1) under the yoke
2) a beast of burden, an ass
2a) the ass was the common animal used by the Orientals on journey and for carrying burdens
Part of Speech: adjective
Neuter of a compound of G5259 and G2218; an animal under the yoke (draught beast), that is, (specifically) a donkey: - ass.
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 ὑποζύγιον; click on the second column to search for that grammatical form of the root ὑποζύγιον; click on the third column to search for that word and grammatical form; click on the total to search for the root ὑποζύγιον.