Free from flutter; remaining steady and still without quivering or trembling movements.
From flutter + -less (suffix meaning without or lacking). This productive suffix in English creates opposites and negations from root words, dating back to Old English.
The -less suffix is one of English's most useful tools—it's a free modifier that can attach to almost anything to create its opposite. Flutterless is a beautiful example of linguistic economy.
Complete word intelligence in one call. Free tier — 50 lookups/day.