noun / verb
lapse
LAPS/læps/
A slipping away from a required condition or standard.
The man's lapse in attention lets the tea overflow as he watches his phone.

Etymology
Latin labi describes slipping or falling, and its noun lapsus already included “falling into error.” A lapse in judgment or attention is thus a figurative slip rather than a physical loss of footing.
In context
She quickly recovers from this brief lapse, a momentary lapse, into sensual reverie.
More examples
- Sharing the password was a serious lapse in judgment.
- Your coverage may lapse if you miss a payment.
- When work gets stressful, she lapses into bad habits.
Forms
lapse · lapses · lapsed · lapsing