| Abstruse | (adj) Difficult to understand |
| Acumen | (n) Keen insight |
| Ascertain | (v) Discover |
| Cerebral | (adj) Of the brain |
| Faculty | (n) Ability |
| Obfuscate | (v) Make difficult to understand. |
| Ruminate | (v) To think deeply about |
| Stymie | (v) To frustrate or thwart |
| Surmise | (v) To guess |
| Tenet | (n) A principle or belief |