bị

Etymology
.

Noun

 * 1) big sack made from sedge
 * 2)  plastic bag

Verb

 * 1) particle denoting the subject is negatively affected by the predicate
 * 2)  to be (used to form the passive voice if the subject is negatively affected by the action)
 * 1)  to be (used to form the passive voice if the subject is negatively affected by the action)
 * 1)  to be (used to form the passive voice if the subject is negatively affected by the action)

Usage notes
The particle bị indicates that the subject is negatively affected by what comes after the bị. This can be a noun or adjective (bị bệnh "to be ill") or a phrase (bị con chó cắn "to be bitten by a dog"). In the second case, this construction is equivalent to the passive voice; it is however only used when the subject is negatively affected (otherwise  is used).