Sticky; having a sticky, greasy, or tacky surface (onomatopoeic). Used for hands, clothes, walls, etc.
手がベトベトして水で洗いたい。
My hands are sticky; I want to wash them with water.
台所の壁に油がはねてベトベトになった。
Oil splattered on the kitchen wall and it became greasy.
梅雨で髪がベトベトするのが嫌だ。
I hate how my hair gets sticky in the rainy season.