Verb
become flared and widen, usually at one end
Source: WordNetThe bellbottom pants flare out Source: Internet
For a more polished look, add a few inches of duct tape to the top of the boot to make them flare out slightly. Source: Internet
Walk around and practically feel the heat shimmer off the abandoned roadway, and the glare of the sun flare out over the pools of shadow with the true-to-life shadow and lighting effects. Source: Internet