ぼかす
暈す
bokasu

Godan Verb (su)

1. to blur; to shade off; to gradate

Transitive
Usually Written in Kana
海綿かいめんみず吸収きゅうしゅうしますので水彩すいさい絵具えのぐをぼかしたりするとき便利べんりです。
kaimenwa mizuo kyūshū shimasunode suisaienoguo bokashitari suru tokini benridesu.
Sponge absorbs water so it is convenient for shading water-colours and such.
Godan Verb (su)

2. to obscure; to make ambiguous

Transitive
Usually Written in Kana
Other forms: