滔天大罪

heinous crime

overflow / torrent-dash

day / sky / heaven

gargantuan / as big as the sky / enormous

see 大夫[dai4 fu5]

big; large; great / older (than another person) / eldest (as in 大姐[da4 jie3]) / greatly; freely; fully / (dialect) father / (dialect) uncle (father's brother)

guilt / crime / fault / blame / sin

variant of 罪[zui4], crime