What does "unhair" mean?

To remove hair from (something), especially from hide.

Unhair

verb

verb ·Rare ·Advanced level

Verb

1
To remove hair from (something), especially from hide. transitive
"The sides, after being unhaired, are put in clean water over night, then green-shaved and put in a bate of hen manure four or five days."
2
To become free from hair. intransitive
"If the skin is soaked in an amine solution before being placed in the lime it unhairs at a faster rate, however, than if soaked in plain water, as shown in Table VII."

"The sides, after being unhaired, are put in clean water over night, then green-shaved and put in a bate of hen manure four or five days."

From un- + hair.