Things that fell out of my mouth today during a meeting:
Inter- means “between groups.” Intra- means “within one group.” (e.g., “interscholastic competition” means a contest between different schools;”intra-team communications” means talking amongst your teammates)
Get to “yes” first, from all parties involved, to avoid later “no”s.
Random thought after explaining to a non-IT person how they broke a piece of the internet (though not totally their fault – combining a 1980s app with arcane Exchange 2010 features frequently does not end well):
A key communications skill when explaining tech to nontech users seems to be anthropomorphizing the effect of their actions on the application.