ˈtɑːrtərəs

Definitions

1. adjective

relating to or resembling tartar, especially in being hard and unyielding

“The tartarous surface of the teeth made brushing them a challenge.”

2. adjective

difficult or unpleasant to deal with

“The project’s manager described the client as tartarous to work with.”

3. noun

a hard, unyielding, or unpleasant quality or person

“Her tartarous nature made it difficult to become friends with her.”