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Webster 1913 Edition
Rack-rent
Rack′-rentˊ
(răk′rĕntˊ)
, Noun.
 A rent of the full annual value of the tenement, or near it; an excessive or unreasonably high rent. 
Blackstone.
 Rack′-rentˊ
,Verb.
 T.
 To subject to rack-rent, as a farm or tenant. 
Webster 1828 Edition
Rack-rent
RACK'-RENT
,Noun.