'Gloom' in the Bible

For if God messengers who sinned did not spare, but with chains of thick gloom, having cast them down to Tartarus, did deliver them to judgment, having been reserved,

These are wells without water, and clouds by a tempest driven, to whom the thick gloom of the darkness to the age hath been kept;

wild waves of a sea, foaming out their own shames; stars going astray, to whom the gloom of the darkness to the age hath been kept.