(typography) the iteration mark 々, used to repeat kanji

(typography) each mark of the pairs of iteration marks ゝ/ゞ and ヽ/ヾ, respectively used to repeat 清音 (seion)/濁音 (dakuon) hiragana and katakana

(typography) either of the iteration marks 〱 and 〲, respectively used to repeat more than one 清音 (seion) and 濁音 (dakuon) in vertical text, as well as their decomposed counterparts, 〳, 〴 and 〵

chickens come home to roost, so you should be prepared for your curse to come back to you. Also said to admonish someone against cursing another person casually.

Uniform Resource Locator

dotting the i's and crossing the t's

(literally) know the other side and yourself, a hundred battles will not be perilous

(literally) a beautiful single red flower that blooms within a field of trees and grass / (figuratively) something unique that stands out among many other things