nonchalant.

Calmly casual, showing little visible concern or excitement.

Use it for

Words that belong together

• nonchalant manner
• nonchalant shrug

On the page

He offered a nonchalant shrug and checked the clock.

Usage notes

Primary category: literary / elevated general. Forms: Comparative more nonchalant; superlative most nonchalant when comparison is meaningful. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: character, description. Commonness: moderately common.