霧(きり) kiriが gaだんだん dandan濃(こ)く() kokuなっている natteiru。 The fog is gradually getting thicker. Literal Fog [subject-が] gradually thick become-[progressive-ている]. だんだん ('gradually, little by little') is another mimetic-origin adverb. Contrasts with どんどん (fast progression) — だんだん is slower and more continuous. weather~くなる (become)~ている (ongoing state)
霧(きり) kiriが gaだんだん dandan濃(こ)く() kokuなっている natteiru。 The fog is gradually getting thicker. Literal Fog [subject-が] gradually thick become-[progressive-ている]. だんだん ('gradually, little by little') is another mimetic-origin adverb. Contrasts with どんどん (fast progression) — だんだん is slower and more continuous. weather~くなる (become)~ている (ongoing state)