VERB + FLUTTERLESS
designed, insure
FLUTTERLESS + NOUN
skims
adj
Without fluttering.
[…] While over its bosom the dim vapours hover, / And flutterless skims the snowy-winged plover: […]
Without the form of sound distortion called flutter.
The Synchro-Sound 16-mm. professional camera is described which features a sprocketless sound drive designed to insure flutterless recording.