三さん等とう空くう曹そうMeaningsNoun1. staff sergeant (JASDF)Other spellings３さん等とう空くう曹そうUsage share unknownKanji used三three等equal空empty air曹cadetComposed of三さん等とうthird classNoun空くうempty air; sky; shunyata (the lack of an immutable intrinsic nature within any phenomenon); emptiness; air force; fruitlessness; meaninglessness; void (one of the five elements); empty (e.g. set)Noun曹そうpalace room for government officials; fellow; set (of people); clan; familyNoun