ˈbrül noun
( -s )
Etymology: probably from German brüllen to roar, bellow, from Middle High German brüelen; akin to Middle Dutch brullen to roar, bellow, Middle High German bral shout; all from a D-German root of imitative origin
: a low roar : a deep murmur or humming
list to the brool of that royal forest voice — Thomas Carlyle