means Filled with a sudden surge of creativity, motivation, or brilliant ideas, as if seized by a force greater than yourself.

from From Latin 'inspirare,' to breathe into — from 'in-' (into) plus 'spirare' (to breathe), the same root that gives us 'spirit' and 'respiration.' The original sense was deeply religious: a god or the divine breathing life, knowledge, or prophecy directly into a person. English borrowed it through Old French in the medieval period, and only later did it soften from sacred inbreathing into the everyday spark of a good idea.