(chemistry) chloral

(swimming) crawl / (Internet) crawl

(chemistry) chlorine

(swimming) to crawl / (Internet) to crawl

黒鷺: Pacific reef heron

Pacific reef heron (Egretta sacra)

(literally) a black-feathered bird / (archaic) Synonym of 黒鴨 (kurogamo, “common scoter”) / (archaic) a black chicken

(Internet slang, especially anime and manga fandom) events or things from the past which one wants to whitewash/erase from history (due to it being embarrassing, poorly received, etc.); dark past

Berkshire pig

rye