Synonym: immensely. Similar words: ghastly, costly, mostly, vast, bristly, honestly, priestly, modestly. Meaning: ['vɑːstlɪ] 
adv. to an exceedingly great extent or degree.
adv. to an exceedingly great extent or degree. 
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211. That came from seeing people undersell his abilities and calling him vastly overrated and whatnot.
More similar words: ghastly, costly, mostly, vast, bristly, honestly, priestly, modestly, unjustly, earnestly, castle, devastate, devastation, devastating, castle in the air, carry coals to Newcastle, plaster cast, vase, canvas, vassal, canvass, evasive, evasion, crevasse, pervasive, vascular, invasion, invasive, pervasion, canvassing.