Douglas Harper's Etymology Dictionary
Wiktionary
muchly
adv. (context colloquial English) very much, very
Usage examples of "muchly".
Its utility was grievously impaired, it having been muchly damaged on the Alaria, and he feared, too, that on this world it would constitute little more than a clumsy, weighty encumbrance.
The guards had liked us, muchly, and had apparently expected that they would for, to our delight, they had purchased a small bottle of Ka-la-na wine, in a wicker basket, which they had permitted us, swallow by swallow, to share.
The depot, incidentally, had been muchly crowded, thought not with fee carts.