一门心思 Traditional 一門心思 yī mén xīn si 🔊 to set one's heart on sth (idiom) + Keep this word Meanings yī mén xīn si 一門心思 to set one's heart on sth (idiom) Its characters 一yīoneHSK 1门méngateHSK 2心xīnheartHSK 4思sīto think