A small, crudely built building; a shanty.
intr.v. shacked, shack·ing, shacksIdiom:
To live or dwell: farm hands shacking in bunkhouses.
shack up Slang
1. To live together and have sexual relations without being married.
2. To live, room, or stay at a place: I'm shacking up with my cousin till I find a place of my own.
[Probably back-formation from dialectal (chiefly southern United States) shackly, rickety, perhaps from English dialectal shackle, to litter, disorder, frequentative of SHAKE.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.