pain          
 noun [ C or U ] uk/peɪn/ us/peɪn/
A2 (肉体上的)痛,疼痛
a feeling of physical suffering caused by injury or illness
  Her symptoms included abdominal pain and vomiting. 她的症状包括腹痛和呕吐。 
 Are you in (= suffering from) pain? 你疼吗? 
 She was in constant pain. 她一直疼个不停。 
 These tablets should help to ease the pain. 这些药片会有助于缓解疼痛。 
 I felt a sharp pain in my foot. 我感到脚上一阵剧痛。 
 He's been suffering various aches and pains for years. 他多年来一直受着各种病痛的折磨。 
 B2 (感情或心理上的)痛苦
emotional or mental suffering
  It's a film about the pains and pleasures of parenthood. 这是一部描写为人父母者的酸甜苦辣的影片。 
 The parents are still in great pain over the death of their child. 这对父母还在为孩子的死而悲痛万分。 
 - More examples
 - She cried out in pain as the bullet grazed her shoulder.
 - He collapsed, groaning with pain.
 - I felt a sharp pain and looked down to see blood pouring from my leg.
 - She went to the doctor complaining of chest pains.
 - Aspirin reduces pain and inflammation.
 
Idioms        
on/under pain of deathidiom  formal 违令则处死,在死亡的威胁下
If you have to do something on/under pain of death, you will be killed if you do not do it.
 a pain (in the neck)idiom  informalB2 极其讨厌的人(或事物)
someone or something that is very annoying
  That child is a real pain in the neck. 那个孩子真讨厌。 
 Synonyms: annoyancebore (ANNOYING) bother (ANNOYING) inconvenience irritant (MAKING ANGRY)nuisancepest 
 a pain in the arse/backsideidiom UK offensive (US a pain in the ass/butt) 极其讨厌的人(或事物)
someone or something that is very annoying
  The kids were a real pain in the arse. 这些孩子真讨厌。 
 pain       
verb [ T ]  formal uk/peɪn/ us/peɪn/
 使痛苦
If something pains you, it causes you to feel sad and upset.
  [ + to infinitive ] It pains me to see animals being mistreated. 看到动物受虐待我很痛心。