blot (2 is common Eliz.; 3 not pre-S.)
1.
to tarnish,
stain, sully
Shr. V. ii. 140
“It blots thy
beauty”
; absol. LLL. IV. iii.
241.
2.
to calumniate, throw
mud at John II. i. 132.
3.
to obscure
Ven. 184
“vapours when they blot
the sky.”