何故なら (なぜなら)because; the reason is; if you want to know why

何故なら, its kanji, and other words that share them.Open this graph

Kanji in 何故なら

何なにwhat
何かなにかsomething; some
何もなにも(not) anything; (nothing) at all
何度なんどhow many times
何とかなんとかsomething; something or other
何のどのwhich; what (way)
何よりなによりabove anything else; above all
何でもなんでもany; anything
事故じこaccident; incident
故障こしょうbreakdown; failure
故郷ふるさとhome town; birthplace
交通事故こうつうじこtraffic accident
故人こじんthe deceased; the departed
故意こいintent; intention
故国ここくone's native land
人身事故じんしんじこaccident resulting in personal injury or death (esp. traffic, rail, etc.)

See how 何故なら connects to the rest of Japanese.