2 ache
Function:
nounInflected forms:
plural achesMeaning:
[count] : a pain that is not sharp but continues for a long time ▪ He had a dull ache in his back from lifting boxes all day. ▪ muscle aches —often used in combination with parts of the body ▪ a headache ▪ a stomachache ▪ toothaches —often used figuratively ▪ She looked through the old pictures with a dull ache in her heart. ◊Aches and pains are many small pains that happen at the same time and make people feel uncomfortable. ▪ Symptoms of the flu include fever, general aches and pains, and sore throat. ▪ the many aches and pains of old age
—achy 
/ˈeɪki/ adjective ach·i·er; ach·i·est ▪ My feet are tired and achy from walking all day.
/ˈeɪki/ adjective ach·i·er; ach·i·est ▪ My feet are tired and achy from walking all day.