from The American Heritage® Dictionary of the English Language, 4th Edition
- pro. Each the other. Used to indicate that a relationship or an action is reciprocal among the members of the set referred to by the antecedent: The boys like each other.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- pro. to one another; one to the other; signifies that a verb applies to two or more entities both as subjects and as direct objects:
Sorry, no etymologies found.