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Webster 1913 Edition

adv.

Reluctantly; slowly; aversely.

[Obs.]

Sir P. Sidney.

Perversely; ill.

[Obs.]

And does he think so

backwardly

of me?

Shakespeare

backwardly ‎(comparative more backwardly, superlative most backwardly)

In a backward direction.
- 1552, Richard Huloet, Abcedarium Anglico Latinum
  Bowed backwardlye, recuruue.