The Oxford Thesaurus An A-Z Dictionary of Synonyms - leadenadj.

1) heavy, onerous, ponderous, dense, burdensome: Exhausted, he dragged his leaden feet to the next meeting. 2) heavy, dull, numbing, oppressive: I was happy to escape the leaden atmosphere of the theatre. 3) grey, dull, dingy, gloomy, glowering, lowering, dreary, dismal, oppressive, dark, sullen, sombre: The leaden sky seemed to forebode disaster as he fled across the moor. 4) inert, lifeless, listless, sluggish, inanimate, inactive, lethargic, languid, languorous, torpid, spiritless, stagnant, static, dormant, soporific, sleepy: The refugees trudged along at a leaden pace.