|1.||to be of use, advantage, profit, or assistance (to)|
|2.||avail oneself of to make use of to one's advantage|
|3.||use or advantage (esp in the phrases of no avail, to little avail)|
|[C13 availen, from vailen, from Old French valoir, from Latin valēre to be strong, prevail]|
avail oneself of
Take advantage of, benefit by. For example, To get a better mortgage, he availed himself of the employee credit union. [Late 1500s]
Use, employ, as in I'll avail myself of the first cab to come along. [Mid-1800s].