EPTITUDE

PRONUNCIATION: (EP-ti-tood/tyood)

MEANING: noun: Skill or proficiency in a situation or a task.

ETYMOLOGY: Back-formation from ineptitude, from Latin aptus (apt, fitted), past participle of apere (fasten). Earliest documented use: 1967.
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ENTITUDE - having the inertia of a tree

PEPTITUDE - having a delicate stomach

EPPI 'TUDE - Ann Landers [pen name of Eppie Lederer] had a chip on her shoulder