What does 何故 (naze | なぜ) mean in Japanese?

The Japanese word

何故そう思うの？
naze sō omō no?
Why do you think so?

何故来なかったの？
naze ko nakatta no?
Why didn't you come?

何故彼女にいわなかったんだ？
naze kanojo ni iwa nakattan da?
Why didn't you tell her?

一体全体何故君がここにいるのだ？
ittaizentai naze kimi ga koko ni iru no da?
Why on earth are you here?

あなたは何故今日忙しいのですか。
anata wa naze kyō isogashī no desu ka.
Why are you busy today?

あなたは何故そう考えるのですか。
anata wa naze sō kangaeru no desu ka.
Why do you think so?

彼は何故あんなに怒ってるんだろう。
kare wa naze annani okotterun daro u.
I wonder why he is so angry.

何故彼女は私を邪魔したのだろうか。
naze kanojo wa watashi o jama shi ta no daro u ka.
Why did she interrupt me?

何故君はその間ずっと黙っていたのですか。
naze kimi wa sonokan zutto damatte i ta no desu ka.
Why were you silent all the time?

あなたは何故去年京都に住んでいたのですか。
anata wa naze kyonen kyōto ni sun de i ta no desu ka.
Why did you live in Kyoto last year?

何故彼女がそんなことしたのか想像もつかない。
naze kanojo ga sonna koto shi ta no ka sōzō mo tsuka nai.
I cannot conceive why she has done such a thing.

彼が何故大学に進学しないのか私にはわからない。
kare ga naze daigaku ni shingaku shi nai no ka watashi ni wa wakara nai.
I don't know the reason why he will not go on to college.

何故メアリーが彼といっしょにピクニックに行くの。
naze mearī ga kare to issho ni pikunikku ni iku no.
How come Mary is going on a picnic with him? | Why is Mary going for a picnic with him? | Why is Mary going on a picnic with him?

そもそも何故私の物だけ液晶に線が入っていたのか。
somosomo naze watashi no mono dake ekishō ni sen ga haitte i ta no ka.
In any case why was it only mine that had a line in the LCD?

何故イギリスだけが王権を弱めることに成功したのか。
naze igirisu dake ga ōken o yowameru koto ni seikō shi ta no ka.
Why is it that only England succeeded in abridging the King's power?

何故私は彼らを撃つ、教えてくれ、彼らが何をしたのだ？
naze watashi wa karera o utsu, oshie te kure, karera ga nani o shi ta no da?
Why am I shooting these guys, tell me, what have they done?

何故君は前もって私にそのことを言ってくれなかったのか。
naze kimi wa maemotte watashi ni sono koto o itte kure nakatta no ka.
Why didn't you tell it to me in advance? | Why didn't you tell me in advance?

自然環境の回復を宣伝する組織がリサイクルに力を入れて、植林に貢献しないのは何故か。
shizen kankyō no kaifuku o senden suru soshiki ga risaikuru ni chikara o ire te, shokurin ni kōken shi nai no wa naze ka.
Since many organizations are putting effort into recycling in order to restore the natural environment, why won't you contribute to reforestation?

政治学とは、誰が、いかにして、何を、何時そして何故、手に入れるかについての学問である。
seiji gaku to wa, dare ga, ikani shi te, nani o, nan ji soshite naze, te ni ireru ka nitsuite no gakumon de aru.
Politics is the science of how who gets what, when and why.

	The Japanese word
	何故
	is pronounced
	naze \| なぜ
	means
	why, how

	Examples:
	何故そう思うの？ naze sō omō no? Why do you think so?
	何故来なかったの？ naze ko nakatta no? Why didn't you come?
	何故彼女にいわなかったんだ？ naze kanojo ni iwa nakattan da? Why didn't you tell her?
	一体全体何故君がここにいるのだ？ ittaizentai naze kimi ga koko ni iru no da? Why on earth are you here?
	あなたは何故今日忙しいのですか。 anata wa naze kyō isogashī no desu ka. Why are you busy today?
	あなたは何故そう考えるのですか。 anata wa naze sō kangaeru no desu ka. Why do you think so?
	彼は何故あんなに怒ってるんだろう。 kare wa naze annani okotterun daro u. I wonder why he is so angry.
	何故彼女は私を邪魔したのだろうか。 naze kanojo wa watashi o jama shi ta no daro u ka. Why did she interrupt me?
	何故君はその間ずっと黙っていたのですか。 naze kimi wa sonokan zutto damatte i ta no desu ka. Why were you silent all the time?
	あなたは何故去年京都に住んでいたのですか。 anata wa naze kyonen kyōto ni sun de i ta no desu ka. Why did you live in Kyoto last year?
	何故彼女がそんなことしたのか想像もつかない。 naze kanojo ga sonna koto shi ta no ka sōzō mo tsuka nai. I cannot conceive why she has done such a thing.
	彼が何故大学に進学しないのか私にはわからない。 kare ga naze daigaku ni shingaku shi nai no ka watashi ni wa wakara nai. I don't know the reason why he will not go on to college.
	何故メアリーが彼といっしょにピクニックに行くの。 naze mearī ga kare to issho ni pikunikku ni iku no. How come Mary is going on a picnic with him? \| Why is Mary going for a picnic with him? \| Why is Mary going on a picnic with him?
	そもそも何故私の物だけ液晶に線が入っていたのか。 somosomo naze watashi no mono dake ekishō ni sen ga haitte i ta no ka. In any case why was it only mine that had a line in the LCD?
	何故イギリスだけが王権を弱めることに成功したのか。 naze igirisu dake ga ōken o yowameru koto ni seikō shi ta no ka. Why is it that only England succeeded in abridging the King's power?
	何故私は彼らを撃つ、教えてくれ、彼らが何をしたのだ？ naze watashi wa karera o utsu, oshie te kure, karera ga nani o shi ta no da? Why am I shooting these guys, tell me, what have they done?
	何故君は前もって私にそのことを言ってくれなかったのか。 naze kimi wa maemotte watashi ni sono koto o itte kure nakatta no ka. Why didn't you tell it to me in advance? \| Why didn't you tell me in advance?
	自然環境の回復を宣伝する組織がリサイクルに力を入れて、植林に貢献しないのは何故か。 shizen kankyō no kaifuku o senden suru soshiki ga risaikuru ni chikara o ire te, shokurin ni kōken shi nai no wa naze ka. Since many organizations are putting effort into recycling in order to restore the natural environment, why won't you contribute to reforestation?
	政治学とは、誰が、いかにして、何を、何時そして何故、手に入れるかについての学問である。 seiji gaku to wa, dare ga, ikani shi te, nani o, nan ji soshite naze, te ni ireru ka nitsuite no gakumon de aru. Politics is the science of how who gets what, when and why.

	Examples sourced from tatoeba.org