Unbridled \Un*bri"dled\, a. [Pref. un- not + bridled.]
Loosed from the bridle, or as from the bridle; hence,
unrestrained; licentious; violent; as, unbridled passions.
"Unbridled boldness." --B. Jonson.
[1913 Webster]
Lands deluged by unbridled floods. --Wordsworth.
[1913 Webster] -- {Un*bri"dled*ness}, n. --Abp. Leighton.
[1913 Webster]