i Register
In some senses, dreadly is marked as obsolete. Watch for register when choosing this word.
ADJ.
calm, sweeping
DREADLY + NOUN
pilgrim, solitude, thro'
PREP.
'mid
ADV.
unutterably
adj
dreadful
1652, Anonymous, "Christs Kingdome" in Eliza's Babes, Or, The Virgin's Offering, critical edition by L. E. Semler, Associated University Press, 2001, p. 73, lines 16-20, https://books.google.ca/books?id=C2_I9s7b3NwC&printsec=frontcover#v=onepage&q&f=false At thy approach, black shades did vanish, / And from my heart thou feare didst banish, / And in their room did light appear, / And joy instead of dreadly feare.
1770, Oliver Goldsmith, The Deserted Village, in The Poetical Works of Dr. Goldsmith, London: J. Osborne & T. Griffin, 1785, p. 44, https://books.google.ca/books?id=aA0UAAAAQAAJ&printsec=frontcover#v=onepage&q&f=false […] To distant climes, a dreadly scene, / Where half the convex world intrudes between, / To torrid tracts with fainting steps they go, / Where wild Altama murmurs to their woe.
adv
With dread.
1641, Du Bartas His Diuine Weekes And Workes, translated by Josuah Sylvester, London: Robert Young, "The Captains. The Fourth Part of the Third Day of the II. Week," p. 181 https://books.google.ca/books?id=pcAFFu1rUqIC&printsec=frontcover#v=onepage&q&f=false So shall you see a Cloud-crown'd Hill somtime, / Torn from a greater by the waste of Time; / Dreadly to shake, and boundling down to hop, / And roaring, here it roules tall Cedars up;
[…] when high in Air / The chos'n Archangel rides, whose right hand weilds / Th'imperial standard of heav'n's providence, / Which dreadly sweeping thro' the vaulted sky / O'ershadows all creation.
1652, Anonymous, "Christs Kingdome" in Eliza's Babes, Or, The Virgin's Offering, critical edition by L. E. Semler, Associated University Press, 2001, p. 73, lines 16-20, https://books.google.ca/books?
Wiktionary1770, Oliver Goldsmith, The Deserted Village, in The Poetical Works of Dr. Goldsmith, London: J. Osborne & T. Griffin, 1785, p. 44, https://books.google.ca/books?id=aA0UAAAAQAAJ&printsec=frontcover#v=
WiktionaryLo! 'mid the dreadly solitude a pilgrim form I see / Swift gliding towards me—
Wiktionary1641, Du Bartas His Diuine Weekes And Workes, translated by Josuah Sylvester, London: Robert Young, "The Captains. The Fourth Part of the Third Day of the II. Week," p. 181 https://books.google.ca/boo
Wiktionary[…] when high in Air / The chos'n Archangel rides, whose right hand weilds / Th'imperial standard of heav'n's providence, / Which dreadly sweeping thro' the vaulted sky / O'ershadows all creation.
WiktionaryHis vast countenance was unutterably and dreadly calm;
Wiktionaryi Register
In some senses, dreadly is marked as obsolete. Watch for register when choosing this word.