[uhn-der-shurt] 
| a collarless, usually pullover undergarment for the torso, usually of cotton and either sleeveless and low-cut or with sleeves, worn chiefly by men and children. |
| un·der·shirt (ŭn'dər-shûrt') n. An upper undergarment, typically having short or no sleeves, worn next to the skin under a shirt. |
dərˌʃɜrt