This is the kanji is used as a negation prefix (c.f. ).

on readings:
  • fu
  • bu
kun readings:
    -
examples:
bukiyō dexterous
fuan no tane cause of unease
便 fuben inconvenient
fueki immutability
fugu deformity, crippled
fujiyū discomfort, want, privation
fukabun indivisible
fukaketsu indispensable, essential
fukanō impossible
fukenkō not healthy, unhealthful
fukō usefulness to one's parents
fumei unclear
funensei nonflammable, fireproof
futeki fearless, daring
fuun misfortune
jinjifusei unconciousness
Niji kakurete miezu November 22 - 26
oyafukō usefulness to one's parents
undōbusoku lack of exercise

links:
Japanese calander
Wiktionary

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Last ∆ on 27 January 2026 by Bradley James Wogsland.