cranky

Etymology

From crank + -y. Compare Middle Low German krankich (“sickly, unwell”).

adj

1. (of a machine, etc.) Not in good working condition.
   We had seven canoes, all of them dugouts. One was small, one was cranky, and two were old, waterlogged, and leaky. The other three were good. 1914, Theodore Roosevelt, Through the Brazilian Wilderness: The River of Doubt
2. Grouchy, grumpy, irritable; easily upset.
   He got home from a long day at work tired and cranky.
3. Not in perfect mental working order; eccentric, peculiar.
   Uncle Esau is as cranky as hell, and a peculiar old duck, but I think he'll like a fine upstanding young man as big as you be. 1934 December, Robert E. Howard, “The Road to Bear Creek”, in Action Stories
4. Synonym of crank (“of a ship: liable to capsize because of poorly stowed cargo or insufficient ballast”)
   a cranky vessel
5. (archaic) Full of spirit; spirited.
6. (obsolete) Weak, unwell.