tamp
/tæmp/verb
with obj.
1- pack (a blast hole) full of clay or sand to concentrate the force of the explosion（用沙土）封（炮眼）：
when the hole was tamped to the top, gunpowder was inserted.
当炮眼被封到顶时, 把火药塞进去。
1.1
- with obj. and adverbial of direction ram or pack (a substance) down or into something firmly夯实（物质）; 拍实：
he tamped down the tobacco with his thumb.
他用拇指把烟丝按实。
词源
early 19th cent.: probably a back-formation from tampin （interpreted as 'tamping'）， variant of TAMPION.