Definition, synonyms and related words
plural of still
"The camera crew set up three large metal stills to heat the water for the hot tub."
Third-person singular simple present indicative form of still
"She waits in silence, and the clock ticks on while she remains stills until her turn arrives."
In plain English: To still something means to make it stop moving so that everything becomes quiet and calm.
"The sudden noise stills everyone in the room instantly."