突とっ発ぱつ性せい難なん聴ちょうMeaningsNoun1. sudden deafness; SD; sudden sensorineural hearing loss; SSHLKanji used突thrust発let out性nature (of a person)難difficult聴actively listenComposed of突とっ発ぱつoutbreak; occurrenceNoun性せいnature (of a person); sex; gender; sex (i.e. sexual attraction, activity, etc.); -ty; -ity; -ness; -cyNoun難なん聴ちょうhardness of hearing; bradyacusia; deafness; hearing loss; having poor reception (radio, etc.)Noun