persist + -ent

source: [ご注文はうさぎですか？のチノが抱きついてくるココアを引き剥がそうとするGIF画像｜無料GIF画像検索 GIFMAGAZINE 71541]

1. continuing firmly or obstinately in a course of action in spite of difficulty or opposition:

〈人･行為が〉 «…に» 固執している «in» ; しつこい, ねばり強い, 頑固な

e.g. one of the government's most persistent critics.

2. continuing to exist or endure over a prolonged period:

〈望ましくない状態が〉(通常より長く)継続している, (必要以上に)長続きする; 繰り返して起こる

e.g. persistent rain will affect many areas

e.g. persistent reports of human rights abuses by the military.

(of a chemical or radioactivity) remaining within the environment for a long time after its introduction:

e.g. PCBs are persistent environmental contaminants.

3. Botany & Zoology (of a part of an animal or plant, such as a horn, leaf, etc.) remaining attached instead of falling off in the normal manner.