致死性家族性不眠症 ちしせいかぞくせいふみんしょう Meanings Noun fatal familial insomnia; FFI Kanji 致 bring about. Read as チ. 死 die 性 nature. Read as ショウ. 家 home 族 tribe. Read as ゾク. 不 un- 眠 sleep. Read as ミン. 症 symptom. Read as ショウ. Word lists Medicine Jinuma: Japanese Dictionary · Word lists