the.com/interact
Two things touching and changing — the universe's smallest possible conversation.
means To act on each other, so that one thing's behavior shifts another's in response.
from Latin inter (between) plus act (to do), assembled in the 1830s — a young word for an ancient habit.
Physics coreThe four forces are literally called interactions.
Button verbSoftware's favorite euphemism for clicking things.
Mutual ruleOne-way action is influence, not interaction.