mightst -Second-person singular simple present form of Xyzy

'Were I hard-favour'd, foul, or wrinkled-old, （hard-favoured-ill-looking;)

Ill-nurtured, crooked, churlish, harsh in voice, (churlish-脾气坏）

O'erworn, despised, rheumatic and cold,    ( O'erworn--?)

Thick-sighted, barren, lean and lacking juice, (thick-sighted--Dim of sight; weak-sighted.)

Then mightst thou pause, for then I were not for thee(mightst-第二人称单数）

But having no defects, why dost abhor me?     （dost- do 的第二人称、单数、现在式）