listlessly, apathetically, inertly, half-heartedly
sluggishly, dully, slowly
limply, flaccidly
languidly, languorously, dreamily
wearily, faintly, listlessly
Он вяло ответил на мой вопрос.
He answered my question listlessly.
Он потыкал вилкой в тарелку без аппетита.
He listlessly poked at the food on his plate with a fork.