[ODO:] {verb} 1. avail oneself of = Use or take advantage of (an opportunity or available resource) 2. avail = [with object] Help or benefit [Etymonline] c. 1300, availen, apparently a French compound formed in English from Old French a- "TO" (see ad-) + vailen "to avail," from...

As far as I know, the French language is considered as a Romance language, which is derived in its turn from the Latin language. From the other side, the German language is also based on the Latin language. Hence, both of these languages (French and German) share the same base — the Latin. I am ...