The term "made serpentine" refers to something that has been made to take the shape or movement of a snake. Therefore, antonyms for "made serpentine" would include words or phrases that describe the opposite of this, such as "linear," "straight," "rigid," "stiff," "angular," or "square." These antonyms suggest a lack of flexibility, fluidity, or curvature. Other antonyms could be "unbending," "inflexible," "unyielding," or "resolute." Overall, these antonyms convey the opposite of what "made serpentine" implies, suggesting instead something that is solid, immovable, and defined by straight lines and sharp angles. So, the choice of antonyms would depend on the specific context and intended message.