1. no matter - Adverb
2. no matter - Preposition
3. no matter - Interjection
in spite of everything; without regard to drawbacks
Source: WordNetOrthodoxy is life. If we don't live Orthodoxy, we simply are not Orthodox, no matter what formal beliefs we might hold. Seraphim Rose
No matter how just your words may be, when you speak with anger, you ruin all: no matter how boldly you speak, how fairly reprove, or what not. John Chrysostom
What I see around the world would drive me insane if I did not know that no matter what happens, God will have the last word. Paisios of Mount Athos
No matter how beautiful and well crafted a coffin might look, it will not make anyone wish for death. African Proverb
Many dogs kill a hare, no matter how many turns it makes. Hindi Proverb
No matter how long the night, the day is sure to come. African Congo Proverb