1. L ESSON 4: T HOUGHTS AND J UDGMENT. By: Gustavo Vizcarrondo Carlos Alfaro Eusebio Iglesias

2. A BSTRUSE Abstruse: Adjective from Latin ab-, “away from” + trudere, “ to push.” Difficult to understand.

3. A CUMEN Acumen: noun from Latin acuere, “to sharpen.” Quickness and keenness of insight or judgment.

4. A SCERTAIN Ascertain: verb from Latin ad-, “to” + cernere, “to determine.” To discover or determine with certainty, especially through examination or experimentation.

5. C EREBRAL Cerebral: adjective from Latin cerebrum, “brain.” A. Of or relating to the brain. B. Appealing to or requiring the use of intellect; intellectual.

6. F ACULTY Faculty: noun from Latin facultus, “power;ability.” A. A natural power or ability. B. A division of a university or a group of teachers.

7. O BFUSCATE Obfuscate: verb from Latin ob-, “over” + fuscare, “to darken.” A. To make difficult to understand. B. To darken; to make in or difficult to see.

8. R UMINATE Ruminate verb from Latin rumen, “throat.” A. To think deeply about; to turn a matter over and over in one’s mind. B. To chew cud, or partially digested food.

9. S TYMIE Stymie: verb origin unknown. To prevent from making progress; to frustrate or thwart efforts.

10. S URMISE Surmise: from French sur, “upon” + mettre, “to put.” A. Verb- to guess; to draw a conclusion without sufficient evidence. B. Noun- A guess; a conclusion without sufficient evidence.

11. T ENET Tenet: noun from Latin tenere, “to hold.” A principle or belief held by a person or an organization.