köken: From awanhaydro- + -han. Coined by Lupon sa Agham (Committee on Science) in the Maugnaying Talasalitaang Pang-agham : Ingles-Pilipino (Correlative Word List for Sciences : English-Filipino), published in 1969 and edited by Gonsalo del Rosario. This term fell under the Kublupon sa Kapnayan (Subcommittee on Chemistry), headed by Roberto B. Torres.
köken: Etymology tree Latin sineder. Esperanto sen Esperanto sen- Esperanto akvo Esperanto -a Esperanto senakva From sen- (“without, -less”) + akvo (“water”) + -a (adjectival ending).