1) Eating, drinking or indulging in sexual relations forgetfully. This means that at the time of committing these acts, one does not remember the fast. However, if one continues even momentarily after recalling the fast, the Saum will be nullified.
(2) Applying eye-drops.
(3) Water entering the ears.
(4) Vomiting, no matter how much. This refers to vomiting which is not self-induced. For the rule regarding self-induced vomiting, (see above no. 10).
(5) Smoke, which is inhaled unintentionally, not by one’s volition or conscious action.