Obdurate adj. Stubbornly refusing to change one’s opinion or course of action. “Despite her plea, he remained obdurate.”

Sapid adj. Having a strong, pleasant taste; palatable. “The wine tasting was a most sapid event.” (of talk or writing) Pleasant or interesting.

Profligate Adj. Recklessly extravagant or wasteful in the use of resources. A profligate lifestyle resulted in his bankruptcy.”

Portent n. A sign or warning that something significant is likely to happen. “an occurrence of crucial portent.”

Virulent adj. Extremely severe or harmful in its effects. Bitterly hostile or antagonistic; hateful. “Virulent criticism.”

Prescient; Prescience adj. Having or showing knowledge of events before they take place; foresight. “You should be prescient about choosing your employer.”

Affinity n. A spontaneous or natural liking or sympathy for someone or something. “He has an affinity for science fiction movies.”

Timorous adj. Showing or suffering from nervousness, fear, or a lack of confidence: “A timorous demeanor.”

Recondite adj. (of a subject or knowledge) Little known, obscure, abstruse. “Recondite information.”

Obsequious adj. Obedient or attentive to an excessive degree. “The obsequious service resulted in an excellent tip.”