钻心 zuānxīn piercingly painful Origin Definitions Defs Strokes Stroke Words Sentences Sents 钻心虫 zuānxīnchóng borer insect The larvae of various snout moths that bore into the stems of crops and cause them to wither; a major agricultural pest.玉米钻心虫 yùmǐzuànxīnchóng corn borer the larva of a moth that bores into corn stalks and other crops such as sorghum and cotton