From Longman Dictionary of Contemporary Englishto/of no availto/of no availFAILif something you do is to no avail or of no avail, you do not succeed in getting what you wantWe searched the whole area but all to no avail. Robbie had disappeared. →avail
Examples from the Corpus
to/of no avail• Work may be done that may be to no avail.• We searched everywhere to no avail.• Their effort to continue life as before, as if nothing had happened, is to no avail.• Trickyflying was to no avail here.• But it was to no avail.• Although she was treated by a vet, it was to no avail.• But effort and reason were to no avail.