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Webster 1913 Edition
Proportionable
Pro-por′tion-a-ble
,Adj.
 Capable of being proportioned, or made proportional; also, proportional; proportionate. 
– Pro-por′tion-a-ble-ness
, Noun.
But eloquence may exist without a 
proportionable 
degree of wisdom. Burke.
Proportionable
, which is no longer much favored, was of our [i. e., English writers’] own coining. Fitzed. Hall.
Webster 1828 Edition
Proportionable
PROPORTIONABLE
,Adj.
  Definition 2025
proportionable
proportionable
English
Adjective
proportionable (comparative more proportionable, superlative most proportionable)
- Capable of being proportioned, or made proportional.