really

adverbs

in accordance with truth or fact or reality

"she was now truly American"; "a genuinely open society"; "they don't really listen to us"

genuinely, really, truly

is derived from

in actual fact

"to be nominally but not actually independent"; "no one actually saw the shark"; "large meteorites actually come from the asteroid belt"

actually, really

is derived from

in fact (used as intensifiers or sentence modifiers)

"in truth, moral decay hastened the decline of the Roman Empire"; "really, you shouldn't have done it"; "a truly awful book"

in truth, really, truly

used as intensifiers; `real' is sometimes used informally for `really'; `rattling' is informal

"she was very gifted"; "he played very well"; "a really enjoyable evening"; "I'm real sorry about it"; "a rattling good yarn"

rattling, real, really, very