iureiurando
iureiurando is a Latin form of iusiurandum, meaning “oath”. It is the ablative singular neuter noun or dative singular neuter noun.
Found 30 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 5.27.10: Illud se polliceri et iureiurando confirmare tutum iter per fines daturum;
All forms of iusiurandum (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.