Cognitive adj. 1. Relating to the process of acquiring knowledge by the use of reasoning, intuition, or perception. 2. Having a basis in or reducible to empirical factual knowledge. “A Cognitive model for success.”

Specious adj.  1. Having the ring of truth or plausibility but actually fallacious. “A specious argument.” 2. Deceptively attractive.

Nebulous adj. 1. Lacking definition or definite content. 2. Lacking definite form or limits; vague. “The test results were nebulous and determined to be unusable.”

Exacerbate transitive verb.  To make more violent, bitter, or severe; to irritate or make worse. “The continued delays were greatly exacerbated by the lack of workers on the project.”

Ostensible adj.  Stated or appearing to be true, but not necessarily so. Being such in appearance, plausible rather than demonstrably true or real. “The ostensible purpose of the trip was for business.”

Disingenuous adj. Not straightforward or candid; insincere or calculating.  “It was disingenuous of her to claim she had no financial interest in the company.”

Derisive (de·ri·sive) adj. Expressing contempt or ridicule; mocking or scornful. “A derisive laugh.”

Prodigious (pro·di·gious) adj. Remarkably or impressively great in extent, size, or degree. “Her prodigious sales performance resulted in a promotion.”

Bucolic (bu·col·ic) adj. Of or relating to the pleasant aspects of country life. “He retired to a more bucolic life on his farm.”

Atypical adj.  Not conforming to type; unusual or irregular. Deviating from what is usual or common or to be expected; often somewhat odd or strange. “The strong sales were atypical of the normally weak market.”