underbound

== English == === Pronunciation === === Etymology 1 === From under- +‎ bound. ==== Verb ==== underbound (third-person singular simple present underbounds, present participle underbounding, simple past and past participle underbounded) (mathematics) To provide a lower bound to. To specify or use boundaries that are too small; to have boundaries that do not encompass the entirety of an entity. Antonym: overbound === Etymology 2 === ==== Verb ==== underbound past participle of underbind