gravemente
/ˌɡɾabeˈmente/ · B2 · adv
severely, seriously
🚑🩹 gravemente = grave + mente: in a grave (heavy) way, so severely
Grave comes from Latin gravis, meaning heavy or weighty. Add -mente, the Spanish adverb ending like English -ly, and you get grave-ly: seriously, severely. Think of a heavy, weighty injury or situation.