otherwise
adj.adj. different from what has already been mentioned. You use it to describe a situation or fact that is not the one you just talked about.
adj. describing a state of affairs that is different from the one previously stated or implied. Often follows a linking verb and functions as a complement.
The evidence suggests the truth is otherwise.
He claimed to be an expert, but his clumsy performance proved otherwise during the practical exam.
While the official report insists the transition was seamless, the testimonies of several disgruntled employees suggest the reality was quite otherwise.
From Middle English otherwise, othre wise, from Old English on ōþre wīsan (literally “in (on) other/different manner”); equivalent to other + -wise. Compare West Frisian yn oarwei (“otherwise”), Icelandic öðruvísi (“different”).
Typically follows a linking verb like 'be', 'seem', or 'prove'.