Jerry-building is a term that refers to constructing a poorly built, fragile structure often without proper planning or materials. The antonyms for this word include words like well-built, sturdy, solid, durable, and strong. Well-built refers to a structure that is carefully planned, designed and constructed according to specifications, using high-quality materials, ensuring that it is durable and long-lasting. Sturdy refers to a structure that is robust, stable, and not easily swayed or shaken. A solid structure is an antonym for jerry-built, referring to a stable and secure building. Durability is vital when building, and a jerry-built structure is therefore the opposite of a durable structure. The opposite of jerry-building, then, is building with great care, using proper materials and planning carefully to ensure structural integrity.