Familiar

Familiar fa-mil-iar / fəˈmilyər / Adjective/Noun  

Adjective

having prior knowledge of something or someone

“No one realizes how beautiful it is to travel until he comes home and rests his head on his old, familiar pillow.”

Lin Yutang (1895-1976)

Noun

a demon tending and obeying a witch

“You see, a witch has to have a familiar, some little animal like a cat or a toad; he helps her somehow.”

Henry Kuttner (1915-1958)