Viol
Easton's Dictionary
Heb. nebel (Isa. 5:12, R.V., “lute;” 14:11), a musical instrument, usually rendered “psaltery” (q.v.)
Smith's Dictionary
[Psaltery]
International Standard Bible Encyclopedia
vi'-ol (nebhel, nebhel): the King James Version and the Revised Version (British and American) in Isa 14:11; Am 5:23; 6:5; the King James Version alone in Isa 5:12, the Revised Version (British and American) "lute." "Viol" is derived from Latin vitella, a doublet of vitula, a "viol"; hence, French vielle, doublet of viole. The viol was a bowed instrument, the parent of the violin tribe, and is not a true equivalent for nebhel.
See MUSIC.