Home › Words › U › underbuildunderbuildunderbuild means to build beneath another structure; provide a foundation or support for; undergird.Among words judged in Lexicurio's Arena, underbuild ranks #1,958 of 42,747 for Qualifying.EtymologyFrom under- + build.verbTo build beneath another structure; provide a foundation or support for; undergird.e.g.“The two eastern arches have been underbuilt for the sake of strengthening them.” — 1900, Yorkshire Archaeological Society, Yorkshire archaeological journal: Volume 15:To perform insufficient construction on a building or in an area; build below a specified requirement or standard.e.g.“Appellee was obliged to overbuild, rather than underbuild, the appellant's telephone line for the distance of these six spans for the following reason [...]” — 1903, West Publishing Company, The Northeastern reporter: Volume 65:Definitions & examples from Wiktionary (CC BY-SA 3.0).