What's the adjective for resultant? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verb result which may be used as adjectives within certain contexts.
resultative
(grammar) Indicating the state of a nounresulting from the completion of the action expressed by a verb, as with "blue" in "Mary painted the fence blue".
resultless
Without result; lacking effect, success or accomplishment; fruitless.
“However, her attempts towards formalities remain resultless as no one is able, to this day, to enter the forest.”
“The search was resultless. Not only were no bodies or wreckage recovered but no trace was ever found.”
“This, unfortunately, means that some of the attention and tuition given to some of the students in laboratory classes will eventually prove to be resultless.”