Dandelion is an insecticide but is claimed to be potassium-sparing diuretic, hepatic, cholagogue, anti-rheumatic, laxative, tonic, and a bitter.
en.wikipedia.org Stronger coffee (assuming the same extraction yield) is not more bitter than weaker coffee, but simply has more solids.
en.wikipedia.org It forms colorless scales which have a bitter taste, but it is highly inadvisable to taste either this substance or elaterium.
en.wikipedia.org Collections of sketches continued to follow almost annually at times, with a mixture of whimsy, parody, nonsense, and satire that was never bitter.
en.wikipedia.org There was a harsh and bitter siege with vigorous resistance to the attackers, which lasted two years.
en.wikipedia.org