v. ad·joined, ad·join·ing, ad·joins
1. To be next to; be contiguous to: property that adjoins ours.
2. To attach: "I do adjoin a copy of the letter that I have received" (John Fowles).
To be contiguous.
[Middle English ajoinen, from Old French ajoindre, ajoin-, from Latin adiungere, to join to : ad-, ad- + iungere, to join; see yeug- in the Appendix of Indo-European roots.]
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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.