Form – la forma
(Pronounced fohr-mah)
To remember that form is pronounced fohr-mah (forma) in Spanish, use the following mnemonic:
She was on great form at the party until she spotted her former (forma) partner with his new girlfriend.

Forma is feminine so it's la forma. Imagine a lady in a strange form.

Examples of forma (form) in a sentence
El atleta corre con buena forma y gana muchas carreras.
(The athlete runs with good form and wins many races.)
Es importante mantener la forma correcta al levantar pesas.
(It is important to maintain correct form when lifting weights.)
El entrenador corrigió la forma del nadador durante la práctica.
(The coach corrected the swimmer's form during practice.)