Merriam-Webster's Collegiate® Dictionary, 11th Edition
CRAMP
I. noun
Etymology: Middle English crampe, from Anglo-French, of Germanic origin; akin to Middle Dutch crampe; akin to Old High German krampf bent
Date: 14th century
a painful involuntary spasmodic contraction of a muscle, a temporary paralysis of muscles from overuse,
3. sharp abdominal pain, persistent and often intense though dull lower abdominal pain associated with dysmenorrhea, crampy adjective
II. noun
Etymology: Middle English crampe, from Middle Dutch
Date: 15th century
1. a usually iron device bent at the ends and used to hold timbers or blocks of stone together, clamp ,
2. something that confines ; shackle , the state of being confined,
III. verb
Date: 15th century
transitive verb to affect with or as if with a cramp or cramps,
2. confine , restrain , to restrain from free expression, to fasten or hold with a cramp, intransitive verb to be affected with cramps,
IV. adjective
Date: 1674
hard to understand or figure out , being cramped