accretion (noun) – the act of increasing, either through natural growth or the addition of external matter or parts; something that has grown or been added
BREAKDOWN: AC- (to) + CRE- (grow) + -ION (state or act)
— accretive means of or related to natural or directed growth
This word is built on the root CRE-, which means to grow or increase.
Common CRE- words include crescent, crew, decrease, or increase.
More esoteric CRE- words include accretive and decremental.