埋头苦干 máitóukǔgàn to bury oneself in work Origin Definitions Defs Strokes Stroke Words Sentences Sents 埋头 埋頭 máitóu verb + noun to immerse oneself To immerse oneself in a task; to be engrossed in something; to devote oneself wholeheartedly to work or study.苦干 苦幹 kǔgàn to work hard to work hard; to put in a lot of effort; to work tirelessly; to slave away