| Term | Definition |
| FRACT (FRAG) | "break" |
| Fraction | one or more of the equal parts of the whole; fragment |
| Fractious | easily irritated; cross; bad-tempered |
| Fracture | 1. Break or crack; 2. Breaking of a bone |
| Fragile | easily broken; delicate |
| Fragment | part broken off |
| Infraction | act of breaking; breach; violation |
| Refract | bend a ray of light, a heat or sound wave from a straight course |
| Refractory | stubborn; hard to manage |
| OMNI | "all," "every," "everywhere" |
| Omnibus | 1. covering many things at once; 2. A book containing a variety of works by one author |
| Omnific | all-creating |
| Omnipotent | unlimited in power; almighty |
| Omnipresent | present everywhere at the same time; ubiquitous |
| Omniscient | knowing everything |
| Omnivorous | 1. Eating everything, both plant and animal substances; 2. Avidly taking in everything, as an omnivorous reader |
| Flect (FLEX) | "bend" |
| Deflect | turn aside |
| Flexible | pliable ("capable of being bent"); not rigid; tractable |
| Flexor | muscle that serves to bend a limb |
| Genuflect | bend the knee; touch the right knee to the ground, as in worship |
| Inflection | change ("bend") in the pitch and tone of a person's voice |
| Inflexibility | rigidity; firmness |
| Reflect | 1. Throw ("bend") back light, as from a prism; 2. Think deeply or carefully about |
| Reflex | involuntary response to a stimulus |