mutuamente
/ˌmutwaˈmente/ · B2 · adv
mutually
🤝 mutua + mente = mutual + -ly; two sides acting on each other
Spanish builds adverbs by adding -mente (like English -ly) to a feminine adjective. Mutua is feminine mutual, so mutua + mente gives mutually. Say it as moo-TWAH-mente: both sides give and get equally.