ache

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To suffer a dull, sustained pain.
• intransitive verb To feel sympathy or compassion.
• intransitive verb To yearn or long.
• noun A dull, steady pain. synonym: pain.
• noun A painful sorrow.
• noun A longing or desire.

from The Century Dictionary.

• noun Pain of some duration, in opposition to sudden twinges or spasmodic pain; a continued dull or heavy pain, as in toothache or earache.
• noun Synonyms See pain, n., and agony.
• To suffer pain; have or be in pain, or in continued pain; be distressed physically: as, his whole body ached.
• noun A name of garden-parsley, Petroselinum sativum.

from the GNU version of the Collaborative International Dictionary of English.

• noun Continued pain, as distinguished from sudden twinges, or spasmodic pain. “Such an ache in my bones.”
• intransitive verb To suffer pain; to have, or be in, pain, or in continued pain; to be distressed.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun rare A variant spelling of aitch.
• noun obsolete Parsley.
• verb intransitive To suffer pain; to be the source of, or be in, pain, especially continued dull pain; to be distressed.
• noun Continued dull pain, as distinguished from sudden twinges, or spasmodic pain.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb have a desire for something or someone who is not present
• noun a dull persistent (usually moderately intense) pain
• verb feel physical pain
• verb be the source of pain