Apt to flutter, fluttering. Also figurative.

Fluttering, unsteady.

Changing in intensity, now strong, now faint; flickering, fitful, intermittent; tremulous, unsteady; tending to fade or become dim.

flitting about, fluttering; trembling; †shifting, unstable, fleeting.

Quivering, vibrating unsteadily.

That flutters, in various senses of the verb.

That whiffles; blowing, or blown, in light puffs; moving lightly as if driven by gusts of wind.

In senses of the verb both transitive and intransitive. (In quot. 1589 perhaps used for fittered.)

In predicative use: flickering.

= flickering, adj.