reversion

a failure to maintain a higher state

in addition (usually followed by `with')

the act of going or changing something to the opposite side

the act of going back to an earlier place or condition

(genetics) a return to a normal phenotype (usually resulting from a second mutation)

a reappearance of an earlier characteristic

(law) an interest in an estate that reverts to the grantor (or his heirs) at the end of some period (e.g., the death of the grantee)