adverb, adverb taking the 'to' particle, noun or participle which takes 'suru'
Describes something visually loud, overly bright, or tastelessly flashy. Often used with ～した or ～と.
彼女はけばけばした服を着ている。
She is wearing gaudy clothes.
その看板はけばけばと光っていた。
The sign was shining garishly.