dünn(Having a font weight that corresponds to a weight class value of 300 according to the OpenType specification); Lichtn(A property in graphic design software that makes objects visible, much like light in the natural world)
the lungs(plural only • But forst him gape and gaspe, with dread aghast, / As if his lungs and lites were nigh asunder brast. (1596) wiktionary.org • […] / hard puffing breasts and dance-o'erwearied lungs. / And truly had the crier will'd to shout / The doughty Piper's name through polish's trump, / His breath had not suffic'd to twang it out, / So did the poor man's lights puff, pant, and jump / […] (1838))
the lungs being lighter than adjacent parts, now chiefly of an animal(plural only • A hog's lights (or lungs), spleen, and brain found their way into dishes, as did the heart, liver, kidneys, and head, all considered delicacies. Even the feet, ears, and tail were eaten. The hooves were boiled to make glue.wiktionary.org)
wiktionary.org • […] / hard puffing breasts and dance-o'erwearied lungs. / And truly had the crier will'd to shout / The doughty Piper's name through polish's trump, / His breath had not suffic'd to twang it out, / So did the poor man's lights puff, pant, and jump / […] (1838))