むな 空しくなる Show inflections LinksSentence search for 空しくなるSentence search for むなしくなるSentence search for 虚しくなるKanji details for 空Edit in JMdict Godan verb with 'ru' ending1. to die; to expireOther forms虚しくなる 【むなしくなる】 Discussions Log in to talk about this word.