anchor  
 noun [ C ] uk/ˈæŋ.kər/ us/ˈæŋ.kɚ/
  (ON A BOAT)      
 C2 锚
a heavy metal object, usually shaped like a cross with curved arms, on a strong rope or chain, that is dropped from a boat into the water to prevent the boat from moving away
  We dropped anchor (= lowered the anchor into the water) and stopped. 我们抛锚停船。 
 It was time to weigh anchor (= pull up the anchor and sail away). 该是起锚开船的时候了。 
 - More examples
 - The captain of the ship ordered his men to lower the anchor.
 - The missing boat was last seen at anchor off the north Wales coast.
 - There's a huge metal anchor on display in the entrance to the Maritime Museum.
 - The ship's anchor is attached to an enormous length of chain.
 - For several hours the oil rig was adrift and dragging its anchors in the North Sea.
 
  (SUPPORT)      
 C2 可以依靠的人(或物);精神支柱;靠山
someone or something that gives support when needed
  She was my anchor when things were difficult for me. 我身处困境时,她就是我的精神支柱。 
 This treaty has been called the anchor (= strongest part) of their foreign policy. 该条约被称作是他们外交政策的基石。 
   (BROADCASTER)     
 mainly US(广播、电视节目的)主持人 
an  anchorman US  or  anchorwoman US 
 anchor  
verb uk/ˈæŋ.kər/ us/ˈæŋ.kɚ/
  (FASTEN)        
 C2 [ I or T ]抛锚,下锚 
to lower an anchor into the water in order to stop a boat from moving away
 C2 [ T ]把…系住(或扎牢);使稳固,使固定 
to make something or someone stay in one position by fastening him, her, or it firmly
  We anchored ourselves to the rocks with a rope. 我们用绳子把自己固定在岩石上。 
   (BROADCAST)      
 [ T ] mainly US主持,担任(节目的)主持人 
to act as the anchorman or anchorwoman of a programme
  She will anchor the new morning news show. 她将主持新的早间新闻节目。