dis-, di-, dif-

1. To be not the same; to be unlike.
2. To have or express a different opinion; to disagree.
3. Etymology: from Latin differre, "to set apart".

1. Being different, or "not alike, not like, unlike".
2. The amount by which one quantity is different from another; what is left after subtracting one number from another number.
3. A condition in which there is a different opinion; a disagreement.
4. To have an effect or influence; to be important; to matter.

A difference of opinion suggests that certain opinions are "carried in different directions".

The quality or condition that distinguishes one species from all the others of the same genus or class.

Any device that indicates the differences in pressures between two fluids, regardless of any changes in their absolute pressures.

The similarity between a normal cell and the cancer cell, defines what degree of change has occurred: "Cancer cells that are well differentiated are close to the original cells and are usually less aggressive."

"Poorly differentiated cells have changed more and are more aggressive."

The literal and actual meaning of difficult is "not easy".

1. Something which is not easily done, accomplished, comprehended, or solved.
2. A troublesome or embarrassing state of affairs; especially, of financial affairs.
3. A laborious effort or struggle; trouble: "She had difficulty walking into the classroom where she completed the exam with difficulty."
4. A disagreement or dispute about an issue.
5. Having a reluctance, objection, or unwillingness to do something.