ache · noun C /eɪk/
ache
B1 a feeling of pain over an area of your body which continues for a long time
Dictionary examples:
As you get older, you have all sorts of aches and pains.
I've got an ache in my lower back.
Learner example:
Since then, I have [had] a[n] ache in my left leg. (Preliminary English Test; B1; Turkish)
ache · verb I /eɪk/
ache
B2 to have a continuous pain that is unpleasant but not strong
Dictionary examples:
My head/tooth/back aches.
I ache/I'm aching all over.
Learner example:
After a[n] hour of horseback riding your muscles can really ache. (First Certificate in English; B2; Dutch)
