(is) like (the) darkness[es]
Or (the Unbelievers' state) is like the depths of darkness in a vast deep ocean, overwhelmed with billow topped by billow, topped by (dark) clouds: depths of darkness, one above another: if a man stretches out his hands, he can hardly see it! for any to whom Allah giveth not light, there is no light!
或如重重黑暗,笼罩着汪洋大海,波涛澎湃,上有黑云,黑暗重重叠叠, 观者伸出手来时,几乎不见五指。真主没有给谁光明,谁就绝无光明。