frustra

Etymology 1
Latinism, from.

Adverb

 * 1) in vain, uselessly

Etymology
Adverb from *frusterus, for *frudterus/ *fruditerus, from.

Adverb

 * 1) in deception, in error
 * 2) without effect, to no purpose, without cause, uselessly, in vain, for nothing

Etymology
, from.

Verb

 * 1) to frustrate