to reinforce /ˌriːɪnˈfɔːrs/ /ˌriːɪnˈfɔːs/
to strengthen /ˈstreŋ.θən/ /ˈstrɛŋθən/
to fortify /fˈɔːɹɾɪfˌaɪ/ /fˈɔːtɪfˌaɪ/
