en_tn/rev/21/08.md

the cowards

"those who are too afraid to do what is right"

the detestable

"those who do terrible things"

the fiery lake of burning sulfur

"the lake of fire that burns with sulfur" or "place full of fire that burns with sulfur." See how you translated this in Revelation 19:20.

the second death

"dying a second time." This is described as eternal punishment in the lake of fire in Revelation 20:14 and Revelation 21:8. See how you translated this in Revelation 2:11. Alternate translation: "the final death in the lake of fire" (See: rc://en/ta/man/translate/writing-symlanguage)