Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
The word onerarium could not be parsed. Trying a normal dictionary lookup:
No entries found. Showing closest matches:
ŏnĕrārĭus, a, um, adj. [onus], of or belonging to burden, transport, or carriage; that bears a burden, carries freight (class.): jumenta, beasts of burden, Liv. 41, 4: navis, a ship of burden, Sisenn. ap. Non. 536, 5 (opp. actuaria); Caes. B. G. 4, 22; 25 al.; Liv. 22, 11, 6.
Also subst.: ŏnĕrārĭa, ae, f., a ship of burden, a merchant-vessel, a transport, Cic. Att. 10, 12, 2.