そうそう
Meanings
Adjective (な)
Noun
1. hurry; rush; flurry
2. simple; brief; quick
3. rough; crude; careless; inadequate
Expression
4. yours sincerely; yours in haste
letters ending with this start with 前略, 冠省, etc.
Kanji used
grass
Pitch accent
うそう
Used in vocabulary (1 in total)
Sincerely yours (with the nuance of "please excuse the brevity of this letter")