Karana

In Indian philosophy, the name for an
instrumental cause, or the cause by
which another thing is accomplished.
An example often given by the Nyaya
philosophical school states that when
a potter connects two pot-halves using
a stick, the stick is the instrumental
cause for the creation of the pot. In
Sanskrit grammar, the word karana has
a parallel sense; it designates the word
in a sentence that shows how the
action is accomplished.