He bid her adieu.adieua‧dieu /əˈdjuː/ noun (plural adieus or adieux /əˈdjuːz/) [countable] literary 
He bid her adieu.—adieu interjection
WORD ORIGINadieu
Origin:
1300-1400 French ‘to God’EXAMPLES FROM THE CORPUS
- They bade both the merchant and his paramour adieu.
- Within an hour he had kissed Maeve adieu and they were on the road south to Westminster.
COLLOCATIONS FROM THE ENTRY He bid her adieu.
goodbye: He bid her adieu. He bid her adieu.—adieu interjection