-logy

Also known as -logia, ologies, -ology, -ologia

-logy is a suffix in the English language, used with words originally adapted from Ancient Greek ending in (''). The earliest English examples were anglicizations of the French -logie, which was in turn inherited from the Latin -logia''. The suffix became productive in English from the 18th century, allowing the formation of new terms with no Latin or Greek precedent.