Correct spelling for the English word "Slewth" is [slˈuːθ], [slˈuːθ], [s_l_ˈuː_θ] (IPA phonetic alphabet).
The word "slewth" is a portmanteau of the words "slew" and "truth". The term itself is derived from the title of Raymond Chandler's 1939 detective novel "The Big Sleep", featuring the fictional private detective Philip Marlowe. In the novel, Marlowe encounters many layers of deception, obfuscation, and manipulation, exploring the blurred lines between truth and lies. Over time, "slewth" has become a colloquial term used to describe complex mysteries and the process of uncovering truths in detective stories or investigations.