acerbi.us            ADJ    1 1 NOM S N COMP            
acerbi.us            ADJ    1 1 VOC S N COMP            
acerbi.us            ADJ    1 1 ACC S N COMP            
acerbus, acerba -um, acerbior -or -us, acerbissimus -a -um  ADJ   [XXXAO]  
harsh, strident, bitter, sour; unripe, green, unfinished; grievous; gloomy;
acerbius             ADV    COMP                        
acerbe, acerbius, acerbissime  ADV   [XXXBO]  
stridently, with harsh sound; cruelly, harshly; with pain/severity; premature;