This is the 1664th most frequent French word.
bouchez
"Bouchez" means "block" or "plug" (used as a command: "block" or "plug up").
Here, 'bouchez' is an imperative form of the verb 'boucher', meaning 'to seal' or 'block' in the context of physically filling or sealing an opening.
Bouchez les fissures avec du mastic avant de peindre.
Seal the cracks with putty before painting.
This usage of 'bouchez' instructs the act of sealing or closing an opening (a hole) to prevent airflow or unwanted drafts.
Bouchez ce trou pour éviter les courants d'air.
Seal this hole to avoid drafts.
In this example, 'bouchez' is used to instruct someone to cover or block their ears in response to an undesirable auditory experience.