full | common, general, mutual | express | tacit
Your silence implies tacit consent to these proposals.

informed
Doctors must obtain the informed consent of all patients before giving any treatment.

prior
No action can be taken without the prior consent of the owner.

formal, written | parental

give (sb), grant (sb)
You must give written consent before the documents can be released.

refuse (sb), withhold | gain, get, have, obtain
Do you have the consent of your employer?

require, seek

by (common/general/mutual) ~
The contract can only be broken by mutual consent.

with/without sb''s ~
Your property cannot be sold without your consent.

~ for
He gave his consent for treatment.

~ from
consent from the parents

~ to
He withheld his consent to the marriage.

the age of consent
(= the age at which sb is legally old enough to agree to have a sexual relationship)

freely | kindly
He has kindly consented to give us some of his valuable time.

to
Her father would not consent to the marriage.