Definition of "ache"

ache¹

/ˈeɪk/

verb
third-person singular simple present aches, present participle aching, simple past ached or (obsolete) oke, past participle ached or (obsolete) aken
1. (intransitive, stative) To suffer pain; to be the source of, or be in, pain, especially continued dull pain; to be distressed.
  Quotations
  By'r lakin, I can goe no further, Sir, / My old bones akes:[sic] here's a maze trod indeede / Through fourth rights, & Meanders: / by your patience, I needes muſt reſt me.
  1610–1611 (date written), William Shakespeare, “The Tempest”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act I, scene iii], page 13
  The turmoil went on—no rest, no peace. […] It was nearly eleven o'clock now, and he strolled out again. In the little fair created by the costers' barrows the evening only seemed beginning; and the naphtha flares made one's eyes ache, the men's voices grated harshly, and the girls' faces saddened one.
  1918, W[illiam] B[abington] Maxwell, chapter VII, in The Mirror and the Lamp, Indianapolis, Ind.: The Bobbs-Merrill Company
2. (transitive, literary, rare) To cause someone or something to suffer pain.
noun
plural aches
1. Continued dull pain, as distinguished from sudden twinges, or spasmodic pain.
  Quotations
  Fill all thy bones with aches.
  c. 1610, Shakespeare, The Tempest, Act I, Scene II

ache²

/eɪt͡ʃ/

noun
plural aches
1. (obsolete or historical) Parsley.

ache³

/ˈeɪt͡ʃ/

noun
plural aches
1. Rare spelling of aitch.