JLPT N1
晦
dark; obscure; last day of month
Readings
On'yomiカイ
Kun'yomiくら.い、つごもり
Mnemonic
When the SUN is hidden—DARK and OBSCURE like the month's end.
Example Words
晦日 (みそか) last day of month
晦渋 (かいじゅう) obscure; difficult
大晦日 (おおみそか) New Year's Eve
dark; obscure; last day of month