Efficacious adj. Successful in producing a desired or intended result; effective. “Efficacious treatment for the disease.”
Incorrigible adj. Not able to be corrected, improved, or reformed. “His bad habits were incorrigible.”
Malicious adj. Characterized by malice; intending or intended to do harm. “Malicious rumors.”
Doleful adj Expressing sorrow; mournful. “A doleful look.” Causing misfortune or grief. “Doleful consequences.”
Bromide n. A commonplace remark or notion; a platitude. “Her speech contained the usual bromides about teamwork.” A tiresome or dull person; a bore.
Labyrinth n. A complicated irregular network of passages or paths in which it is difficult to find one’s way; a maze. “Exploring the labyrinth of waterways.” An intricate and confusing arrangement.
Abstruse adj. Difficult to understand; obscure. “An abstruse argument presented by the lawyers.”
Veracity n. Conformity to facts; accuracy. “What is the veracity of these allegations.” Habitual truthfulness. “Her veracity and character.”
Sardonic adj. Grimly mocking or cynical. “His sardonic smile.”
Pejorative adj. Expressing contempt or disapproval. Disparaging; belittling. “He used pejorative overtones in his speech.”
Spurious adj. Not genuine, authentic, or true; not from the claimed, pretended, or proper source; counterfeit. Not being what it purports to be; false or fake. “Spurious claims.”
Vitiate v. Spoil or impair the quality or efficiency of. “The government programs were vitiated by excessive red tape.” Destroy or impair the legal validity of.