急性 Traditional form: 急性 Pinyin (reading): jíxìng Definitions: acute Characters: 急 - anxious, worried; hasty, quick; pressing, urgent 性 - sex, nature, character; suffix converting a verb to an adjective Traditional characters: 急 - anxious, worried; hasty, quick; pressing, urgent 性 - sex, nature, character; suffix converting a verb to an adjective