What does accrue mean?
The definition of accrue
Ac*crue”, v. i.
[imp. & p. p. Accrued; p. pr. & vb. n. Accruing.]
Etym: [See Accrue, n., and cf. Accresce, Accrete.]

1 To increase; to augment. And though power failed, her courage did accrue. Spenser.
2 To come to by way of increase; to arise or spring as a growth or result; to be added as increase, profit, or damage, especially as the produce of money lent. “Interest accrues to principal.” Abbott. The great and essential advantages accruing to society from the freedom of the press. Junius.

Ac*crue”, n.
Etym: [F. accrû, OF. acreü, p. p. of accroitre, OF. acroistre to increase; L. ad + crescere to increase. Cf. Accretion, Crew. See Crescent.]

Something that accrues; advantage accruing. [Obs.]