助じょ動どうMeanings1nouninflecting dependent word (abbr.)abbreviationAbbreviation of 助動詞, used as a part-of-speech tag in dictionaries. Not used in ordinary conversation.See also: 助動詞辞じ書しょでは「助じょ動どう」と略りゃくされることがある。In dictionaries, it is sometimes abbreviated as 助動.