相そう等とうそうとうMeanings1nounequality; being equalRefers to the state of being equal in value, amount, status, or degree. Often used in formal or mathematical contexts.両りょう者しゃの権けん利りは相そう等とうである。The rights of both parties are equal.この二ふたつの値あたいは相そう等とうしい。These two values are equal.