cuidadosamente
/kwidaˌdosaˈmente/ · B2 · adv
carefully
🥚 cuidadosa + mente = careful + -ly (cuidado = care)
Cuidado means care, and it comes from Latin cogitatus, meaning thought, so being careful is thinking it through. Spanish makes adverbs by adding -mente to the feminine adjective, the way English adds -ly: cuidadosa + mente.