adjectival noun or quasi-adjective, adverb taking the と particle, noun

  1. busy, hurried, rushed.

expression

Letters ending with this start with 前略, 冠省, etc..
  1. yours sincerely, yours in haste.

adjectival noun or quasi-adjective, noun

Archaism.
  1. simple, brief, quick.

Variations

Pronunciation Kanji Kana Is Common
匆々 そうそう
怱々 そうそう
匆匆 そうそう
怱怱 そうそう

Contained Kanji Breakdown

rush, hurry, be flustered
ソウ いそが.しい (Kentei 1)
not, must not, do not
モチ ブツ ボツ (Kentei Pre-1)
wrapping enclosure, wrapping radical (no. 20)
ホウ つつ.む (Kentei 1)
repeated kanji symbol