facile princeps /fasˈi-lē prinˈseps or fakˈi-le prinˈkeps/

Obviously pre-eminent

• downplayed
• downplaying
• downplays
• downpour
• downpours
• down-quilt
• down-quilts
• downright
• downrightness
• downrightnesses
• downriver
• downrush
• downrushes
• downs
• downscale
• downscaled
• downscales
• downscaling
• down-setting
• down-settings
• downshift
• downshifted
• downshifter
• downshifters
• downshifting