inexhaustible

英 [ɪnɪg'zɔːstɪb(ə)l; ɪneg-] 美[,ɪnɪɡ'zɔstəbl]

• adj. 用不完的；不知疲倦的

1. that cannot be entirely consumed or used up;

"an inexhaustible supply of coal"

2. incapable of being entirely consumed or used up;

"an inexhaustible supply of coal"