Amharic

därämän - affliction of the scalp or skin which causes whitish patches that itch (AED 1736)

­-m­- is hard to explain; metathetic from *daran-am­ with suffixed ­-m?

PCS
*daran- - (kind of) skin disease (SED I No. 58)
Or PWS? Probably from *dar(r/ˀ)-an-­, with ­-n suffixed; cf. Arb. drˀ and Cha. dära, Ezha dära, Gye. dära, Muh. däna, End. däna; note also Enn. dä̃ra which may be alternatively compared to •danr­, with metathesis).