突突 tūtū chugging Origin Definitions Defs Strokes Stroke Words Sentences Sents tūtū chugging 突 tū reduplication thump-thump; chug-chug (onomatopoeia) the sound of a heart beating or an engine running; similar to "thump-thump" or "chug-chug"tūtū to spray 突 tū reduplication to dash (bound form) to dash forward; to rush; to charge; to break through; to collide