köken: From Middle High German regenwurm, from Old High German reganwurm, from Proto-West Germanic *regnawurmi. Analysable as Regen (“rain”) + Wurm (“worm”), so called because of the animal’s habit of surfacing after rainfall. Cognate with Old English reġnwyrm, whence English rainworm.
İspanyolcagusano de tierra, gusano terrero, lambrija, lombriz de tierra, lombriz térrea, miñosa (eril) /lomˌbɾiθ de ˈtjera/
köken: First cited to the Saibara Uta from the Heian period. The memezu form is attested from 1650, and is traditionally viewed as a pronunciation shift from mimizu. Reconstructed as ultimately from Proto-Japonic *memensu, in which case memezu may be a reversion to an older form, also preserved in many dialects. The kanji are jukujikun (熟(じゅく)字(じ)訓(くん)).
köken: Nativisation of the Sino-Korean term 지룡 (地龍, jiryong, “earthworm”) + -이 (-i, noun suffix). First attested as Middle Korean 디로ᇰ이 (Yale: tilwong.i) in the Bunmun onyeok ihaebang (分門瘟疫易解方 / 분문온역이해방), 1542.
köken: dagg (“dew”) + mask (“worm”), used since 1753 in the current sense (Lumbricus terrestris), but earlier of other worms and snails (without a shell), compare English dewsnail.
köken: Inherited from Proto-Slavic *dъždževьnica. By surface analysis, Old Polish deżdż + -ownica, (genitive dżdżu). Compare near cognate Bulgarian дъждовник (dǎždovnik), Slovak dážďovka. The name refers to the fact that these worms can usually be spotted at the surface after heavy rain; compare English rainworm, German Regenwurm. Doublet of deszczownica.