crenel

• 名词，指城墙垛口之间的凹口或缺口，也指城垛边缘一排凸起的部分。

A noun referring to a notch or open space between two merlons in a crenelated battlement, or a series of rounded projections along an edge.

1. Notch in a battlementC2formal

   An open space or gap between two raised sections (merlons) in a castle wall or fortification, used for shooting or observation.

   垛口

   • The archer aimed through the crenel at the approaching army.
   • The castle's battlements had alternating merlons and crenels.
   • He peered through a crenel to see the enemy below.

   同义词crenelleembrasure

2. Rounded projection or notchC2formal

   One of a series of rounded projections or notches along an edge, such as on a leaf, cloth, shell, or a red blood cell in a hypertonic solution.

   圆锯齿或圆缺口

   • The leaf margin had small crenels along its edge.
   • Under the microscope, the red blood cell showed crenels due to the salt solution.
   • The fabric was decorated with a pattern of crenels.

   同义词crenationcrenaturescallop

• 古语动词，指为城墙、城堡等防御工事修筑雉堞（城垛），即设置齿状垛口或射击孔。

An archaic verb meaning to furnish or provide with battlements or crenellations, typically used in the context of fortifications.

1. Supply with battlementsC2formalbritish

   To provide a wall or building with battlements, typically for defensive purposes.

   为…筑城垛

   • The castle was crenelled to protect the soldiers during an attack.
   • They decided to crenel the tower for added defense.
   • The ancient fortress was crenelled with stone parapets.

   同义词battlementcrenelateembattle