groan          
 noun [ C ] uk/ɡrəʊn/ us/ɡroʊn/
C2 (表示痛苦的)呻吟声;(表示不高兴的)哼哼声,叹息声
a deep, long sound showing great pain or unhappiness
  We could hear the groans of the wounded soldiers. 我们能听到伤兵们的呻吟声。 
  抱怨声,埋怨声
a complaining noise or phrase
  He looked at the piles of dirty dishes and gave a groan of dismay. 他看着成堆的脏盘子,发出一声沮丧的叹息。 
 - More examples
- The rescuers could hear the groans of someone trapped in the rubble.
- A groan went up from around the office when the electricity went off.
- The groans of the wounded and dying could be heard all over the battlefield.
- He gave a terrible groan before collapsing to the ground.
- We heard great groans coming from the nextdoor delivery room, followed by bloodcurdling shrieks.
groan          
verb [ I ] uk/ɡrəʊn/ us/ɡroʊn/
C2 (表示痛苦的)呻吟声;(表示不高兴的)哼哼声,叹息声
to make a deep, long sound showing great pain or unhappiness
  He collapsed, groaning with pain. 他痛苦地呻吟着倒了下去。 
 [ + speech ] "Not again," he groaned (= said in a low unhappy voice). “够了,”他不满地说。 
  抱怨,埋怨
to complain or speak unhappily
  She's always moaning and groaning (= complaining a lot) about the weather. 她总是嘟嘟囔囔不停地抱怨天气。 
 - More examples
- He groaned with pain before losing consciousness.
- He groaned at the sight of all the dirty dishes piled everywhere.
- When the computer crashed again, he groaned with frustration.
- "I'm fed up with you moaning and groaning all the time!," she shouted.
- The crash victim groaned as they lifted her gently onto a stretcher.
Idiom   
groan with/under (the weight of) somethingidiom  humorous 满载着;被…堆满
to carry a very large quantity of something
  The tables were positively groaning with food. 饭桌上摆满了丰盛的食物。