Correct spelling for the English word "danked" is [dˈaŋkt], [dˈaŋkt], [d_ˈa_ŋ_k_t] (IPA phonetic alphabet).
The word "danked" does not have an established etymology as it is not found in standard dictionaries or widely recognized in the English language. It could be a neologism or slang term created in recent years. However, if you are referring to the term "dank" (without the -ed), it has its roots in Old English where "danc" meant "strong" or "powerful". Over time, "dank" evolved to refer to something of high quality, potent, or impressive, particularly in reference to marijuana or cannabis. The term gained popularity in cannabis culture and eventually entered mainstream usage.