1
Stage 1 of 3
skrubba
Scandinavian · medieval
"to scrub"
probably from a Scandinavian source, like Danish 'skrubbe'; Middle Dutch 'schrobben' is a cousin
2
Stage 2 of 3
scrobben
Middle English · 1300s
"to rub hard"
first used for rubbing down horses
3
Stage 3 of 3
scrub
English · 1500s
"to rub clean"
'to scrub' a plan, cancel it, is 1940s air-force slang
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