aptitude
ap·ti·tude
noun
1.
Origin
From Middle French aptitude, from Medieval Latin aptitudo, from Latin aptus (“apt, fit”). By surface analysis, apt + -itude. Doublet of attitude.
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.