obviate
ob-vi-ate
verb
To remove a difficulty or need, making it unnecessary or preventing it.
"Careful planning will obviate future problems."
Thesaurus
Synonyms: fend off, forfend, debar, head off, stave off, avoid, ward off, deflect, forefend, avert, rid of, eliminate
Antonyms: ask, call for, demand, involve, necessitate, need, postulate, require, take