Ahju (Ahi)

Stove, oven, kiln. 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., Kiln (prob.) street (1884). Either way, given the humungous alternative of An der alten Wasserleitung (1881) or am Stadt-Wassercanal (1882) from the water supply 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.