The word "弯曲" is formed by combining two characters that each independently denote the concept of bending: "弯" is a pictophonetic character with the radical "弓" (bow) indicating its association with curvature and the component "亦" providing phonetic cues, while "曲" is an ideographic character derived from a pictorial representation of a bent object. Their conjunction creates a compound where both elements synonymously reinforce the meaning of not being straight, resulting in the word's meaning of "bent" or "curved".