gravissimo
gravissimo is a Latin form of gravis, meaning “heavy; serious; important”. It is the ablative singular neuter superlative adjective.
Found 41 times in the Latin texts on Socratos.
Where it is used
Cicero, In C. Verrem 2.1.14: credent omnes v et xxx tribus homini gravissimo atque ornatissimo, M. Annio, qui se praesente civem Romanum securi percussum esse dixit; audietur a populo Ro …
Suetonius, Divus Augustus 53.1.1: … so dictum exultantes comprobassent, et statim manu uultuque indecoras adulationes repressit et insequenti die grauissimo corripuit edicto; dominumque se posthac appellari ne a liberis quidem aut nepotibus suis uel serio uel ioco p …
All forms of gravis (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.