accrue (verb) - to increase or augment through addition or natural growth [uh-kroo]
BREAKDOWN: AC- (to) + CRU- (increase)
accrual is the act or process of increasing or augmenting; an increase or accumulation
accretion is the act or process of increasing, either through natural growth or the addition of external matter or parts; something that has grown or been added
“Investment success accrues not so much to the brilliant as to the disciplined.” —William J. Bernstein