Webster's Revised Unabridged Dictionary · 1913

Boisterous

Boisterous ({not transcribed}) , adjective

[Old English boistous; of uncertain origin; compare Welsh bwyst wild, savage, wildness, ferocity, bwystus ferocious.]

1.
Rough or rude; unbending; unyielding; strong; powerful. [Obsolete]
Boisterous sword. — Shakespeare
Boisterous hand.
2.
Exhibiting tumultuous violence and fury; acting with noisy turbulence; violent; rough; stormy.
The waters swell before a boisterous storm. — Shakespeare
The brute and boisterous force of violent men. — Milton
3.
Noisy; rough; turbulent; as, boisterous mirth; boisterous behavior.
I like not that loud, boisterous man. — Addison
4.
Vehement; excessive. [Rare]
The heat becomes too powerful and boisterous for them. — Woodward