Adirondack Mountains is a back-formation from Adirondacks, which was treated as a plural noun but really it is from Mohawk (Iroquoian) adiro:daks "tree-eaters," a name they applied to neighboring Algonquian tribes. The -s is an imperfective affix.
1852, "a rocking chair," American English, agent noun from rock (v.1). Middle English had rokker, "nurse charged with rocking a cradle" (early 14c.). In sense of "one of the curved pieces of wood that makes a chair or cradle rock" it dates from 1787. Meaning "one who enjoys rock music" (opposed to mod (n.1)) is recorded from 1963, from rock (v.2).
Slang off (one's) rocker "crazy" is attested by 1897 according to OED; a widely reprinted 1903 newspaper column in U.S. identified it as British slang; the image is perhaps mechanical. To get (off) one's rocker seems to have been used earlier in U.S. baseball slang for "get busy, get active in a game" (1895) and does suggest the rocking-chair.
also ratan, type of climbing palm with tough, flexible stems that are economically valuable for making chair-bottoms, walking sticks, baskets, etc., 1650s, from Malay (Austronesian) rotan, rautan, according to OED from raut "to trim, strip, peel, pare."
"cold cuts of pork, sausage, etc.," 1858, from French charcuterie, literally "pork-butcher's shop," from charcutier "pork-butcher" (16c.), from obsolete char (Modern French chair) cuite "cooked flesh," from chair "meat" (Old French char, from Latin carnem "flesh," originally "a piece of flesh," from PIE root *sker- (1) "to cut") + cuit, past participle of cuire "to cook," from Latin coquere "to cook" (from PIE root *pekw- "to cook, ripen"). Compare French charcutier "pork butcher; meat roaster, seller of cooked (not raw) meat."