にい Also written 兄 Meanings Noun suffix older brother; elder brother See also: お兄さん (おにいさん). Words containing にい べにいととんぼ Ceriagrion nipponicum (species of damselfly) にいたかびゃくしん flaky juniper (Juniperus squamata) 体にいい (からだにいい) good for the body Word lists Familiar language Core 5000 Spoken Jinuma: Japanese Dictionary · Word lists