ど

ど U+3069, ど HIRAGANA LETTER DO Composition: と [U+3068] + ◌゙ [U+3099] ← と [U+3068] Hiragana な → [U+306A]

Stroke order

• IPA^(key): [do̞]

The hiragana character と (to) with a dakuten (゛).

ど • (do) 

1. The hiragana syllable ど (do). Its equivalent in katakana is ド (do).

• (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 (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 (𛅐)ゐ゙, 𛄟 (𛄟), ゑ𛅑 (𛅑)ゑ゙, を𛅒 (𛅒)を゙, ん, ー, ゝ, ゞ, ゟ

Appears to be a relatively recent innovation. In mainstream Japanese, this prefix is used as an intensifier. In the Kansai region, the meaning has further developed to convey more negative overtones.^[1][2]

The ultimate derivation is unclear. This may be an extension of the noun 度 (do, “degree, extent”).

ど or ド • (do-) 

1. super-

   どあほ

   do-aho

   dumbass

• どストライク (do-sutoraiku)
• ど真(ま)ん中(なか) (do-mannaka, “exact center; bullseye”)
• ど根性(こんじょう) (do-konjō)

Reading of various kanji characters.

ど • (do) 

1. 度: degree, extent
2. 努: the third of the Eight Principles of Yong

ど • (do-) 

1. 何: indeterminate prefix, used to form question words such as 何れ (dore, “which”, literally “which one”) or 何処 (doko, “where”, literally “what place”)

ど • (-do) 

2. 度: (geometry) degree of an angle; degree in temperature; number of times; percentage of alcohol concentration

From Old Japanese.

ど • (-do) 

1. (archaic, poetic, formal) Attaches to the verb stem, specifically the stem form ending in -e for type 1 verbs. This verb stem is called the 仮定形 (kateikei, “hypothetical form”) in Modern Japanese, and the 已然形 (izenkei, “realis form”) in Classical Japanese. Used to express the contrasting hypothetical condition conjunction: even if, even when
2. (archaic, poetic, formal) Attaches to the verb stem, specifically the stem form ending in -e for type 1 verbs. This verb stem is called the 仮定形 (kateikei, “hypothetical form”) in Modern Japanese, and the 已然形 (izenkei, “realis form”) in Classical Japanese. Used to indicate something is the case irrespective of something else: even though, even as

• ども (domo)
  • 雖(いえど)も (iedomo)
  • 然(さ)れども (saredomo)
  • けれども (keredomo)
• 然(さ)れど (saredo)