What is the English translation of the french verb 'boucher'?

To block up (a pipe, a hole...)

When the subject is doing the action of block

- je bouche le tuyau avec du papier - I am blocking up the pipe with paper.

When the subject is the object blocked.

Boucher is transitive (used with "se")

Le lavabo se bouche à cause des cheveux.

The sink is blocked up because of the hair.

To hold one's nose - se boucher le nez