Ceremony
late Middle English: from Old French ceremonie or Latin caerimonia ‘religious worship’, (plural) ‘ritual observances’.
wiktionary
From Middle English cerymonye, from Latin caerimonia or caeremonia, later often cerimonia(“sacredness, reverence, a sacred rite”).
etymonline
ceremony (n.)
late 14c., cerymonye, "a religious observance, a solemn rite," from Old French ceremonie and directly from Medieval Latin ceremonia, from Latin caerimonia "holiness, sacredness; awe; reverent rite, sacred ceremony," an obscure word, possibly of Etruscan origin, or a reference to the ancient rites performed by the Etruscan pontiffs at Caere, near Rome.
Introduced in English by Wyclif. Also from late 14c. as "a conventional usage of politeness, formality." Disparaging sense of "mere formality" is by 1550s.
