[Buddha-l] Samadhi and faith

[lemmett at talk21.com]

Hi I have a couple of questions if that's fine.
What does the suffix "samadhi" signify in terms like "the Surangama samadhi", specifically 'the three samadhis'? I cannot find anything at all substantial in English to read about this last concept. What is faith according to Wonhyo, especially with respect to his six contemplations in his commentary on the Vajrasamadhi-sutra?Why is his first contemplation signlessness if that samadhi is often thought to occur only at complete extinction?
Best wishes.