nontrivial.

Not simple, obvious, or negligible.

Use it for

Words that belong together

• nontrivial problem
• nontrivial difference

On the page

The delay introduced a nontrivial risk to the schedule.

Usage notes

Primary category: academic / formal. Forms: Comparative more nontrivial; superlative most nontrivial 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: analysis, qualification. Commonness: moderately common.