considerable

demanding considerable mental effort and skill

r with considerable certainty

An earthy carbonate of iron containing considerable carbonaceous matter

a visible mass of water or ice particles suspended at a considerable altitude n

n any collection of particles (e.g., smoke or dust) or gases that is visible n a visible mass of water or ice particles suspended at a considerable altitude n out of touch with reality n a cause of worry or gloom or trouble n suspicion affecting your reputation n a group of many things in the air or on the ground v make overcast or cloudy v make less visible or unclear v billow up in the form of a cloud v make gloomy or depressed v place under suspicion or cast doubt upon v make less clear v colour with streaks or blotches of different shades v make milky or dull