subsoil

== English == === Etymology === From sub- + soil. === Pronunciation === IPA(key): /ˈsʌbsɔɪl/ === Noun === subsoil (countable and uncountable, plural subsoils) The layer of earth that is below the topsoil. ==== Translations ==== === Verb === subsoil (third-person singular simple present subsoils, present participle subsoiling, simple past and past participle subsoiled) (transitive) To turn up the subsoil of. ==== Derived terms ==== subsoiler