Definitions

1. adjective

most skilled or knowledgeable in magic or sorcery

“She was considered the witchiest woman in the village, known for her healing potions and spells.”

2. superlative form of adjective ‘witchy’

having the qualities of a witch, especially in being mysterious, magical, or supernatural

“The old mansion had a witchiest atmosphere, with cobwebs and creaking doors that seemed to whisper secrets.”