豁然贯通 huòránguàntōng to suddenly see the light Origin Definitions Defs Strokes Stroke Words Sentences Sents 豁然 huòrán suddenly enlightened describing a sudden flash of understanding or clarity, as if everything has become clear at once贯通 貫通 guàntōng to master To have a thorough knowledge of a subject; to fully understand and integrate various ideas or concepts.