玉ねぎ

From 玉葱, from 玉 (“ball”) +‎ ねぎ (“scallion, green onion”), literally “ball scallion”.

Note that in Japanese, 葱 (green onion) is the more basic term from which “onion” is derived, while in English it is the reverse – “onion” is basic, while “green onion” is derived from it, reflecting the different importance in cuisine (葱 is more basic to Japanese cuisine, onion is more basic to English cuisine).

玉(たま)ねぎ or 玉(タマ)ねぎ • (tamanegi) 

1. an onion

• 玉葱