en_tn/mrk/09/03.md

radiantly brilliant

"shining" or "glowing." Jesus' garments were so white they were emitting or giving off light.

extremely

as much as possible or more than most

whiter than any bleacher on earth could bleach them

Bleaching describes the process of making natural white wool even whiter by using chemicals like bleach or ammonia. Alternate translation: "whiter than any person on earth could whiten them"