ache

Word family

• aching
  adjectiveB2
• achy
  adjectiveB2
• headache
  nounA2
• toothache
  nounA2
• stomachache
  nounA2
• backache
  nounB1
• earache
  nounB1

Synonym discussion

Sense: noun/1

All four words describe physical hurt, but they differ in intensity, duration, and feel. 'Pain' is the broadest term and covers everything from a small cut to a serious injury; it can be sharp, sudden, or long-lasting. 'Ache' narrows that down to a slow, steady, dull kind of hurt that does not stab but keeps reminding you it is there — typical of tired muscles, an old joint, or a mild headache. 'Soreness' suggests tenderness on the surface or to touch, often after exercise or a bruise: a sore arm hurts when you press it. 'Discomfort' is the gentlest and the most general; it does not even have to be physical and avoids the word 'pain' on purpose, which is why doctors say 'any discomfort?' A patient might describe a slipped disc as a 'sharp pain', a long sitting day as 'a dull ache in my lower back', a gym session as 'soreness in my legs', and a tight shirt as 'mild discomfort'.

Common collocations

Etymology

The word comes from Old English 'acan' (verb) and 'æce' (noun), both with the basic sense of feeling steady pain. For most of its history the verb was spelled 'ake' and the noun 'ache', the way 'speak' and 'speech' still differ today. The modern single spelling 'ache' for both word classes was settled in the 18th century, partly because writers like Samuel Johnson wrongly linked the word to Greek 'akhos' meaning grief — a neat coincidence, since the modern figurative sense ('ache for someone') matches that idea of inner pain quite well.