celery

Celery comes from French céleri, from Lombard selleri, itself a plural form of Latin selīnum, borrowed from Ancient Greek σέλῑνον (sélīnon).

As the word passed from Greek to Latin to Lombard to French and finally into English, it also pushed out two older English names for the plant, march and smallage, which it eventually displaced.

The Greek root sélīnon lies at the base of the whole chain — Latin selīnum, Lombard selleri, and French céleri are all steps of the same word rather than separate relatives.