He tries to be strong to the sake of his children → intenta mostrarse fuerte por el bien de sus hijos The phrase 'the strongest' is suitable, though 'probably the most robust' is incorrect. In English, the superlative type of the adjective 'robust' is 'strongest.' sweet aromatic fragrant scented savoury https://vapeandchews.com/product/strongest-cbd-disposable-vape-uk/