Ache

Noun

• Continued dull pain, as distinguished from sudden twinges, or spasmodic pain.
• (rare) A variant spelling of aitch.
• (obsolete) Parsley.

Verb

• (transitive, literary, rare) To cause someone or something to suffer pain.
• (intransitive) To suffer pain; to be the source of, or be in, pain, especially continued dull pain; to be distressed.