thru

Etymology

Modern use originated in American English as a phonetic and simplified spelling of through around 1839. The spelling had previously been one of several used in Middle English.

prep

1. (Canada, US, informal) Rare spelling of through.
   We wanted an overall treatment system that gave us optimum reliability and required a minimum of labor to operate - from primary clarifier thru sludge handling, … 1996 December, Joe Hastreiter, “Sludge Management Savings Found Among Reeds”, in Water Engineering & Management, volume 143, number 12, Scranton Gillette Communications, page 23
   … to respect human rights, then failing to explicitly define thru common understanding. 2003, Hasson Kevin J., “Religious Liberty and Human Dignity: A Tale of Two Declarations”, in Harvard Journal of Law & Public Policy, volume 27, number 1, Harvard, pages 81–92
   As the technology improves, there is a possibility to reprogram adult stem cells for therapeutic cloning without "passing it thru" the preimplantation embryo, thus negating current ethical challenges to such research. December 22, 2004, Fredericks, Marcel / Odiet, Jeff A. / Miller, Steven I. / Fredericks, Janet, “Toward an Understanding of "Genetic Sociology" and Its Relationships to Medical Sociology and Medical Genetics in the Educational Enterprise.”, in Education, volume 125, number 2, Project Innovation, Inc., →ISSN, pages 222–235
   Going thru a great crisis of self-analysis, especially in relation to job, school, work, students. 2006 December,, Roxanne Mills, “Leadership in Higher Education and the Second Half of Life”, in Education, volume 127, number 2, Project Innovation, Inc., →ISSN, pages 294–302
   Myths and Legends of the Pimas of Arizona as received by J. William Lloyd from Comalk-Hawk-Kih (Thin Buckskin) thru the interpretation of Edward Hubert Wood. 2010 January, David Martinez, “Pulling Down the Clouds: The O'odham Intellectual Tradition during the "Time of Famine"”, in American Indian Quarterly, volume 34, number 1, University of Nebraska Press, →ISSN, pages 1–32
   If you see thru my eyes, you'd wish you weren't here, because all you will feel sadness and fear. It loneliness and sorrow if you see thru my eyes sit and talk to before you say goodbye. […] See thru my eyes and a tear you will see, I wish you could cry and cry with me. 2011, Fancine N. D'Aprile, From Hell on Earth to the Foot of the Cross, Trafford Publishing, page 157
2. (UK, rare, regional or dialectal) Eye dialect spelling of through.