Nh is a digraph of the Latin alphabet, a combination of N and H. Together with lh and the interpunct, it is a typical feature of Occitan, a language illustrated by medieval troubadours.
In some African languages, nh, such as Gogo, it's a voiceless /n̥/.
In the pre-1985 orthography of Guinea for its languages, nh represented a velar [ŋ], which is currently written ŋ.
In the Gwoyeu Romatzyh romanization of Mandarin Chinese, initial nh- indicates an even tone on a syllable beginning in [n], which is otherwise spelled n-.
Early romanizations of Japanese, influenced by Portuguese orthography, sometimes used nh to represent a prepalatal. Today, this is usually written ny.
In Vietnamese, nh represents a palatal [ɲ] word-initially. It was formerly considered a distinct letter, but is no longer. When this digraph occurs word-finally, its phonetic value varies between dialects: