v. a·vailed, a·vail·ing, a·vails
To be of use or advantage to; help: Nothing could avail the dying patient.
To be of use, value, or advantage; serve: Halfway measures will no longer avail.
Use, benefit, or advantage: labored to no avail.
avail (oneself) of
To make use of.
[Middle English availen : a-, intensive pref. (from Latin ad-; see AD-) + Old French valoir, vail-, to be worth (from Latin valēre, to be strong; see wal- in the Appendix of Indo-European roots).]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.