/roʊbɪˈɡɑːlɪə/ or /roʊbɪˈɡɑːliə/ (Note: This word is not a real word, however, I assume you’re referring to the suffix ‘robulous’ or ‘robustia’ or ‘robustalia’ or ‘robulalia’ or ‘robulgaria’ - which are not standard words either, but ‘robulous’ is a known word, with ‘robulous’ as ‘having or showing great physical strength’ - thus robigalia could be an assumed made-up word from this. For the sake of creating a response I will use it as such.)

Definitions

1. noun

A state or condition of robustness, strong or vigorous quality.

“The doctor studied the robigalia of the patient after the illness.”