Being very important, or key to something.
Having or containing the centre of something.
Being in the centre.
Exerting its action towards the peripheral organs.
centre
Significant; substantial.
Sufficiently clothed or dressed to be seen.
Having a suitable conformity to basic moral standards; showing integrity, fairness, or other characteristics associated with moral uprightness.
Fair; good enough; okay.
Conforming to perceived standards of good taste.