Someone who is slothful is lazy and unwilling to make an effort to work.
例句
He was not slothful: he had been busy all night.他可不懒,昨晚他忙了整整一夜。
英英词典释义
Adjective
1. disinclined to work or exertion;
"faineant kings under whose rule the country languished""an indolent hanger-on""too lazy to wash the dishes""shiftless idle youth""slothful employees""the unemployed are not necessarily work-shy"