adverb, adverb taking the 'to' particle, noun or participle which takes 'suru'
gleamingly; shinily; with a greasy shine
Describes a surface that shines with an oily, greasy, or overly glossy look, often with a negative or unpleasant nuance. Commonly used with する or と.
脂ぎった肌がてらてら光っている。
His oily skin is gleaming greasily.
このパンは表
This bread has a shiny, greasy-looking surface.