there are a ton of dictionaries which are useful but once a word has been conjugated and contracted it can no longer be looked up in a dictionary unless one knows what it's roots are.
is there a web site that breaks them down bit by bit? specifically by sutta quote?
a pretend example, since i don't know pali this is gibberish, but this is what it would look like roughly:
sutta quote: "abijjimsa viharatimassa metta"
translation: "one should practice loving kindness every day."
abijjimsa = a contraction of the words: abijha which means "one" and himsa which means "should".
viharatimassa = a contraction of the words: viharama which means "practice" and timassi which means "daily".
metta= loving kindness.