lapse

a mistake resulting from inattention

a break or intermission in the occurrence of something; "a lapse of three weeks between letters"

a failure to maintain a higher state

pass into a specified state or condition; "He sank into nirvana"

end, at least for a long time; "The correspondence lapsed"

drop to a lower level, as in one's morals or standards

go back to bad behavior; "Those who recidivate are often minor criminals"

let slip; "He lapsed his membership"

pass by; "three years elapsed"