truly
tru.ly \'tru:-le-\ av 1: SINCERELY - often used as a complimentary close
after yours)X 2: TRUTHFULLY 3: ACCURATELY 4a: INDEED - often used as an
intensive {~, she is fair} or interjectionally to express astonishment or
doubt 4b: GENUINELY 5: PROPERLY, RIGHTFULLY
Webster's English Dictionary