lifeless /ˈlaɪfləs/ adjective Learner's definition of LIFELESS
[more lifeless; most lifeless]
: having no life无生命的: such as
a : having no living things无生物存在的 b : dead or appearing to be dead死的;像是死的 c : lacking spirit, interest, or energy死气沉沉的;索然无味的
— lifelessness
noun [noncount]