ぞ

• IPA^(key): [d͡zo̞]

The hiragana character そ (so) with a dakuten (゛).

ぞ • (zo) 

1. The hiragana syllable ぞ (zo). Its equivalent in katakana is ゾ (zo).

• (Hiragana) 平仮名; あぁ, いぃ, うぅゔ, えぇ, おぉ, かゕが, きぎ, くぐ, けゖげ, こ𛄲ご, さざ, しじ, すず, せぜ, そぞ, ただ, ちぢ, つっづ, てで, とど, な, に, ぬ, ね, の, はばぱ, ひびぴ, ふぶぷ, へべぺ, ほぼぽ, ま, み, む, め, も, やゃ, 𛀆, ゆゅ, 𛀁, よょ, らら゚, りり゚, るる゚, れれ゚, ろろ゚, わゎわ゙, ゐ𛅐ゐ゙, 𛄟, ゑ𛅑ゑ゙, を𛅒を゙, ん, ー, ゝ, ゞ, ゟ

From Old Japanese. Previously unvoiced as so until the Nara period.

ぞ • (zo) 

1. (colloquial, men's speech) a particle used at the end of sentences, which indicates certainty or emphasis.

   やるぞ！

   Yaru zo!

   I'm gonna do it!

   • 1925, Denji Kuroshima, 「紋」:

     よそで飯(めし)を盗(ぬす)んで食(く)うたりするんじゃないぞ

     yoso de meshi o nusunde kūtari suru n ja nai zo

     You may not steal and eat food in other houses, ever.

2. a particle used as a suffix to an interrogative word to mark it indefinite.
   • 1909, Mokutaro Kinoshita, 南蛮寺門前:

     何(ど)処(こ)ぞで歌(うた)うたふ声(こえ)が聞(きこ)えるやうやのう

     dokozo de uta utau koe ga kikoeru yō ya nō

     It feels like we can hear voice of singers somewhere.

3. (archaic) a particle which makes a question emphasized or rhetorical, used at the end of a sentence or appended to an interrogative word.
   • 1932, Yoshio Mikami, 和算の社会的・芸術的特性について:

     単(たん)純(じゅん)化(か)を貴(とうと)ぶ精(せい)神(しん)が無(な)くして、なんぞ、この種(しゅ)のことが起(お)きて来(こ)ようぞ。

     Tanjunka o tōtobu seishin ga nakushite, nanzo, kono shu no koto ga okite koyō zo.

     Without the spirit of treasuring simplification, how could this kind of things ever happen.

4. (predicative, men's speech) topic particle used for emphasis

   これぞ辞(じ)典(てん)の本(ほん)当(とう)の力(ちから)だ‼

   Kore zo jiten no hontō no chikara da‼

   This is the true power of a dictionary!!

• 良(よ)くぞ (yoku zo)
• 知(し)る人(ひと)ぞ知(し)る (shiru hito zo shiru)
• ここぞとばかりに (koko zo to bakari ni)