cavalier
How to Use Cavalier
Learner’s notesIn plain EnglishAs an adjective, it means careless or too casual about something serious; as a noun, it originally meant a horseman or a 17th-century royalist supporter of Charles I.
In modern use it's almost always the adjective (careless, dismissive) — the horseman/royalist sense is mostly historical, and the Chevrolet Cavalier is unrelated slang.
Word Forms
more cavalier comparative, cavaliered past tense, cavaliers plural, Cavaliers plural, cavaliers singular, most cavalier superlative
Fill the Gap
Can you complete this real example?
He took a _____ attitude toward the safety regulations.
Etymology
From Middle French cavalier ("horseman"), tracing back through Italian and Occitan to Latin caballus ("horse"). A doublet of "chevalier" and "caballero."