Caveat: you won't ever use this word in conversation. If you dare, you'll need to explain it.

Adj. unstinting : very generous; not restricting or holding back : giving or being given freely or generously examples : The task was made easier by the unstinting help extended to me. unstinting devotion He is willing to give and share unstintingly a group of school volunteers who are unstinting with their time you can also say : : <an unstinting volunteer> and <unstinting praise> ............................................................ useful link : ^_^ http://www.thefreedictionary.com/unstinting

From the start, Michael was unstinting in his professional and personal generosity.

unstinting adj. excessively generous, giving

Unstinting means "very generous".