Ahju (Ahi)

Stove or oven. For those interested in trivia: one of the two >3‑letter street names whose letters are in alphabetical order (see Hiiu). Started life simply enough in German as Töpfergasse (1882), potter’s street, apparently after a local craftsman (called Floss), then Estonia stepped in with only four of its six main possible spelling permutations – Pottisseppa, Pottiseppa, Pottisepa and Potissepa (all 1885) missing out not only the most sensible, Potisepa, but also the most accurate, Pottsepa, and why compound words involving sepp (smith) do not usually involve a genitive in the first place I don’t know (see Kullassepa, Rätsepa & Sepa*) – then the Russians either translating it nearly correctly as Гончарный пер. (1892, pottery lane, пер. = abbreviation of переу́лок) or incorrectly as Печная ул., Oven street (1884). Either way, given the humungous alternative of An der alten Wasserleitung (1881), from the water channel prolonging that of Veerenni, a four-letter word was probably in order, and an anagram of Jahu it became.

Although perhaps they do, see Nõmme.