1. underhold - Noun
2. underhold - Verb
To support or uphold, especially from beneath; sustain.
(music) To hold a note for a shorter duration than required.
To hold (an infant or child) for less time than needed.
(wrestling) An unfair seizing of an opponent under the arms.
(gymnastics) An underhand grip, especially while hanging from a bar.
Source: en.wiktionary.org