"Venesuture" is a rare word that refers to the act of venesection, or the surgical incision of a vein. The phonetic transcription of this word is /vɛnɪˈsɛkʃər/. The emphasis is on the second syllable, and the "t" is silent. The spelling of this word comes from the Latin words "vena" meaning vein and "sectura" meaning incision. While not commonly used in everyday conversation, "venesuture" is a specialized term used in medical contexts.
Suture of a vein, phleborrhaphy.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.