IPA: /ˈeɪkɪnəs/
KK: /ˈeɪkɪnəs/
A feeling of discomfort or pain in the body, often described as a dull or continuous ache.
After the long hike, I felt a persistent achiness in my legs.
Achiness → It is formed from "ache" (from Old English "acan", meaning to suffer pain) and the suffix "-ness" (meaning the state or quality of). The word "achiness" refers to the state of experiencing pain or discomfort.
Think of the word 'ache' which means to suffer pain, and remember that 'achiness' describes the state of having that pain.