Etymology

unable

U1N1A1B3L1E1

Today it means: Not able; lacking a certain ability. Full definition →

Middle English unable
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unable · adjective, interjection1

  1. Middle English · inherited fromunable
  2. English todayunable

From Middle English unable, unabel, unhable, unhabil, equivalent to un- + able.

unable · verb2

  1. Middle English · inherited fromunablen
  2. English todayunable

From Middle English unablen, equivalent to un- + able.

Etymology from Wiktionary, CC BY-SA 4.0.